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Digital Equipment StorageWorks UltraSCSI DS–BA370 Series User Manual

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DIGITAL StorageWorks
UltraSCSI RAID Enclosure
(DS–BA370–Series)
User's Guide
Part Number: EK–BA370–UG. B01
January 1998
The DIGITAL DS–BA370-series UltraSCSI RAID rack-mountable
enclosure is the basic building block of the UltraSCSI RAID
subsystems. This guide, and the related publications comprise the
basic documentation set for these subsystems.
Digital Equipment Corporation
Maynard, Massachusetts

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Summary of Contents for Digital Equipment StorageWorks UltraSCSI DS–BA370 Series

  • Page 1 Part Number: EK–BA370–UG. B01 January 1998 The DIGITAL DS–BA370-series UltraSCSI RAID rack-mountable enclosure is the basic building block of the UltraSCSI RAID subsystems. This guide, and the related publications comprise the basic documentation set for these subsystems. Digital Equipment Corporation Maynard, Massachusetts...
  • Page 2 January 1998 Digital Equipment Corporation makes no representations that the use of its products in the manner described in this publication will not infringe on existing or future patent rights, nor do the descriptions contained in this publication imply the granting of licenses to make, use, or sell equipment or software in accordance with the description.

  • Page 3: Table Of Contents

    Table of Contents Preface Intended Audience ..............xi Structure ................xi Documentation Conventions ..........xiii Related Documents ............. xiv Manufacturer’s Declarations Electromagnetic Compatibility..........xv Acoustic Noise Declarations..........xvi 1 Introducing the UltraSCSI RAID Enclosure An UltraSCSI Bus Overview ..........1–4 Product Description.............1–5 Enclosure Status..............1–10 Typical Controller Status LEDs........1–11 Environmental Monitoring Unit (EMU) Status LEDs1–12...
  • Page 4 Table of Contents 2 Operating the UltraSCSI Enclosure UltraSCSI Configuration Rules ...........2–1 General ..............2–2 UltraSCSI RAID Controllers........2–3 UltraSCSI Nodes............2–4 UltraSCSI Enclosures..........2–5 Enclosure Addressing..........2–6 Starting the Subsystem............2–7 Shutting Down the Subsystem..........2–9 Using the Power Standby Mode ....... 2–10 Applying DC Power..........2–11 Turning Off the Subsystem ........
  • Page 5 Table of Contents Configuration Fault Code Reporting........3–21 Replacing an EMU............3–27 4 Power Verification and Addressing (PVA) Product Description.............4–2 Functions ................4–3 PVA Operation..............4–3 EMU Installation Monitoring ........4–3 SBB Device IDs............4–4 Monitoring Power Supply Operation ......4–5 Setting the Enclosure Address ..........4–6 Master Enclosure Address ..........4–7 Expansion Enclosure Addresses .........4–8 Implementing the Standby Power Mode ......4–9 Replacing a PVA...............4–11...
  • Page 6 Table of Contents 6 Power Distribution Power System Overview .............6–2 Power Configurations..........6–2 Standard (n+1) ..........6–2 n+4 (Redundant) ..........6–3 n+4 (Optimum)..........6–3 AC Power Source............6–3 AC Input Power Controller ........6–4 Shelf Power Supplies ..........6–5 AC Power Buses ..............6–6 Standard (n+1) Power Configuration........6–7 Redundant (n+4) Power Supply Configurations....6–8 Optimum (n+4) Power Supply Configurations.....6–9 Power Supply Error Condition Reporting ......6–10...
  • Page 7 Table of Contents A UltraSCSI Enclosure Specifications Physical and Electrical Specifications ........A–2 Operating Environments.............A–3 SBB Thermal Stabilization..........A–4 B Assembling an UltraSCSI RAID Subsystem Installation Sequence ............B–2 Installing the Power System ..........B–3 Installing the EMU............. B–4 Installing the PVA.............. B–4 Installing the Disk Drives...........
  • Page 8 Table of Contents Figures Figure 1–1 DS–BA370 Series UltraSCSI Enclosure ...1–1 Figure 1–2 Typical DS–BA370 Applications .....1–3 Figure 1–3 Typical Enclosure Bus and Device Addressing.1–6 Figure 1–4 DS–BA370 Status LEDs Locations ....1–10 Figure 1–5 RA7000 Status LEDs Locations .....1–10 Figure 1–6 Typical Array Controller OCP LEDs....1–11 Figure 1–7 EMU Status LED Locations ......
  • Page 9 Table of Contents Figure 7–2 SBB Status LEDs ..........7–3 Figure 7–3 Typical SBB Regulatory Label......7–5 Figure 7–4 Typical SBB Bezel Label .........7–6 Figure 8–1 Enclosure Blower Assemblies Locations ..8–2 Tables Table 1–1 UltraSCSI Subsystems Capacities ......1–7 Table 2–1 DIGITAL–Supported Enclosure Address Settings2–6 Table 2–2 Turning Off the DC Power.......2–10 Table 2–3 Turning On the DC Power .......2–11 Table 2–4 Turning Off the Subsystem Power ....2–12...
  • Page 10 Table of Contents Table 5–10 Installing an I/O Module........5–20 Table 5–11 Removing an Expansion Cable ......5–22 Table 5–12 Installing an Expansion Cable......5–23 Table 6–1 Shelf Power Status LED Displays....6–10 Table 6–2 Removing a Power Supply.......6–12 Table 6–3 Installing a Shelf Power Supply .......6–13 Table 6–4 Removing an AC Input Power Controller ..6–15 Table 6–5 Installing an AC Power Controller....

  • Page 11: Preface

    Preface The DIGITAL StorageWorks UltraSCSI RAID Enclosure (DS–BA370-Series) User’s Guide describes the functions, operations, components, configurations, assembly, and specifications of this enclosure. Intended Audience This document is for use by personnel responsible for designing, configuring, assembling, installing, and operating UltraSCSI RAID subsystems using a DS–BA370-series enclosure mounted in either a data center cabinet or a departmental server cabinet.
  • Page 12 Preface Chapter 5 This chapter describes the single-ended I/O module operation, functions, uses, configuration, and replacement procedures. Chapter 6 This chapter describes the enclosure power distribution components operation, functions, uses, configuration, and replacement procedures. Chapter 7 This chapter describes the disk drives operation, functions, uses, configuration, and replacement procedures.

  • Page 13: Documentation Conventions

    Preface Documentation Conventions The documentation conventions used in this publication are as follows: boldface Boldface type indicates the first instance of terms being defined in the text, the glossary, or both. type italic type Italic type indicates emphasis and publication titles. Italic type in the glossary indicates a cross–reference.

  • Page 14: Related Documents

    Preface Related Documents The following publications contain additional information about the UltraSCSI RAID subsystem. Publication Title Order Number AC Input Power Controller (DS–BA35X–HE) Installation Guide EK–35XHE–IG Blower (DS–BA35X–MK) Installation Guide EK–35XMK–IG Environmental Monitoring Unit (DS–BA35X–EB) Installation Guide EK–35XEB–IG HSZ70 Array Controller HSOF Version 7.0 CLI Reference Manual EK–CLI70–RM HSZ70 Array Controller HSOF Version 7.0 Configuration Manual EK–HSZ70–CG...

  • Page 15: Manufacturer's Declarations

    Manufacturer’s Declarations Electromagnetic Compatibility You can install this CE–Mark Class A certified product in a commercial or an office environment. __________________ WARNING! ___________________ This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.

  • Page 16: Acoustic Noise Declarations

    Manufacturer’s Declarations Acoustic Noise Declarations DIGITAL declares that the acoustic values of this product are as follows: Acoustics – Declared Values per ISO 9296 and ISO 7779: Sound Pressure Level Sound Power Level (bystander positions) Product Idle Operate Idle Operate RAID Array 7000 Subsystem 48.4 48.4...
  • Page 17 2 – ac power controllers (DS–BA35X–HE) 8 – 180 W shelf power supplies (BA35X–HH) 24 – disk drives (2, 4, 9 GB) ______________________________ Note ______________________________ Aktuelle Werter für spezielle Austüstungsstufen sind über die Digital Equipment Vertretungen erhältlich. 1 Bel = 10 dBA. __________________________________________________________________ xvii...
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  • Page 19: Introducing The Ultrascsi Raid Enclosure

    (random array of independent disks) enclosure (DS–BA370-series), see ™ Figure 1–1, is the basic building block for DIGITAL single-ended UltraSCSI RAID subsystems. Figure 1–1 DS–BA370 Series UltraSCSI Enclosure CXO5797A ™ Trademark of Digital Equipment Corporation Ultra SCSI RAID Enclosure 1–1...
  • Page 20 Introducing the Ultra SCSI RAID Enclosure This enclosure cannot function until: • It is installed in an UltraSCSI data center cabinet (DS–SW600-series) • It is installed in an UltraSCSI departmental server (DS– SWXRE-series). • 3.5-inch StorageWorks building block (SBB) disk drives are installed •...

  • Page 21: Figure 1-2 Typical Ds-Ba370 Applications

    Introducing the UltraSCSI RAID Enclosure Figure 1–2 Typical DS–BA370 Applications CXO6264A Ultra SCSI RAID Enclosure 1–3...

  • Page 22: An Ultrascsi Bus Overview

    Introducing the Ultra SCSI RAID Enclosure An UltraSCSI Bus Overview Developed by the Digital Equipment Corporation and subsequently standardized by the ANSI (American National Standards Institute) SCSI committee as standard X3T10, UltraSCSI is a technology that incorporates several improvements over a Fast SCSI 10 bus.

  • Page 23: Product Description

    Introducing the UltraSCSI RAID Enclosure Product Description The UltraSCSI enclosure is a rack mountable unit that accommodates the following components: • A minimum of one, or a maximum of two, UltraSCSI controllers with cache modules , such as the DS–HSZ70-series •...
  • Page 24 Introducing the Ultra SCSI RAID Enclosure The enclosure backplane eliminates the need for cables to connect the six vertical buses to the four horizontal SBB shelves. All the devices on a shelf use the same SCSI bus ID. The PVA selectable enclosure UltraSCSI ID defines the SCSI bus ID of each shelf.

  • Page 25: Table 1-1 Ultrascsi Subsystems Capacities

    Introducing the UltraSCSI RAID Enclosure • I/O modules UltraSCSI RAID Subsystem A subsystem is one or more departmental server cabinets or data center cabinets with enclosures. Each subsystem requires a master enclosure with an UltraSCSI controller installed. Installing one or two expansion enclosures and connecting them with cables creates an expanded subsystem.
  • Page 26 Introducing the Ultra SCSI RAID Enclosure • In conjunction with the associated EMU, ensures that the major components are functioning properly and notifies the user and the array controller of error or fault conditions. Each PVA functions only with its host enclosure and EMU.
  • Page 27 Introducing the UltraSCSI RAID Enclosure Expansion EMU An environmental monitoring unit installed in an expansion enclosure is an Expansion EMU. This EMU communicates with the master EMU over the EMU—EMU communications bus. Upon loss of communications with the master EMU, the expansion EMU assumes control of certain expansion enclosure functions.

  • Page 28: Enclosure Status

    Introducing the Ultra SCSI RAID Enclosure Enclosure Status When any of the multiple error detection circuits determines there is a problem, an audible alarm may sound and one or more sets of status LEDs (light emitting diodes) display an error code. The enclosure has two go—no go indicators (see Figure 1–4).

  • Page 29: Typical Controller Status Leds

    Introducing the UltraSCSI RAID Enclosure Typical Controller Status LEDs The operator control panel (OCP) status LEDs (see Figure 1–6) display the controller status. For a detailed explanation of each status code refer to the controller documentation. Figure 1–6 Typical Array Controller OCP LEDs Port Reset button...

  • Page 30: Environmental Monitoring Unit (Emu) Status Leds1-12

    Introducing the Ultra SCSI RAID Enclosure Environmental Monitoring Unit (EMU) Status LEDs The EMU status LEDs (see Figure 1–7) have multiple functions (see Chapter 3, “Environmental Monitoring Unit”). Figure 1–7 EMU Status LED Locations CXO5774A 2. System fault LED (amber). 3.

  • Page 31: Power Supply Status Leds

    Introducing the UltraSCSI RAID Enclosure Power Supply Status LEDs Each power supply (see Figure 1–9) has two green status LEDs—the Shelf Status LED and the Power Supply Status LED. See Chapter 6, “Power Distribution” for detailed information about these LEDs. Figure 1–9 Power Supply Status LED Locations Shelf status LED...

  • Page 32: I/O Module Leds

    Introducing the Ultra SCSI RAID Enclosure I/O Module LEDs Each I/O module (see Figure 1–11) has two green status LEDs that display the status of both the internal and the external SCSI bus terminator power (TERMPOWER). Whenever TERMPOWER is present, the LED is O See Chapter 5, "Single–Ended I/O Modules,"...

  • Page 33: Redundant Power Supply Configuration

    Introducing the UltraSCSI RAID Enclosure Redundant Power Supply Configuration Adding three SBB shelf power supplies and a second ac power controller provides significantly more power redundancy than the standard configuration. A system power failure will occur for any of the following conditions: •...

  • Page 34: Dual Controllers

    Introducing the Ultra SCSI RAID Enclosure Dual Controllers Establishing a dual-redundant subsystem with two UltraSCSI controllers, two cache modules, and external cache batteries, is the most effective and efficient method of ensuring continuous subsystem operation. UltraSCSI Bus Expansion Some controllers support expanding the UltraSCSI bus from the master enclosure to two expansion enclosures.

  • Page 35: Operating The Ultrascsi Enclosure

    Operating the UltraSCSI Enclosure Setting up an UltraSCSI RAID subsystem for operation involves implementing the procedures described in the system specific “Getting Started” manual provided with each system. This chapter supplements and expands on this information. Other chapters in this manual contain detailed information about individual component functions, operations, error conditions, and so forth.

  • Page 36: General

    Operating the UltraSCSI Enclosure General The following rules apply to the UltraSCSI bus: 1. The UltraSCSI RAID subsystems can transfer data at a higher rate (40 MB/sec versus 20 MB/sec) than do the FAST 10 subsystems. 2. UltraSCSI subsystems require 68-pin VHDCI cables and connectors. The physical difference in the contact spacing precludes using FAST 10 cables.

  • Page 37: Ultrascsi Raid Controllers

    Operating the UltraSCSI Enclosure The maximum transfer rate when using a wide (–VW suffix), FAST 10 device is 20 MB/sec. b. The maximum transfer rate when using a narrow (–VA suffix), FAST 10 device is 10 MB/sec. UltraSCSI RAID Controllers ___________________ Caution _____________________ Should there be a conflict in controller configuration information between this document and the controller specific...

  • Page 38: Ultrascsi Nodes

    Operating the UltraSCSI Enclosure UltraSCSI Nodes A node is a SCSI device that uses a SCSI bus ID. The following rules apply to UltraSCSI nodes, such as disks, tapes, and so forth. 1. Only a controller node can use SCSI bus ID 7. 2.

  • Page 39: Ultrascsi Enclosures

    Operating the UltraSCSI Enclosure UltraSCSI Enclosures The following configuration rules apply to the UltraSCSI RAID subsystem enclosures: 1. The only compatible power controller is the model DS–BA35X–HE. 2. The only compatible power supply is the model DS–BA35X–HH (180 W). The bezel label (see Figure 2–1) identifies these power supplies.

  • Page 40: Enclosure Addressing

    Operating the UltraSCSI Enclosure Enclosure Addressing The following configuration rules apply to the UltraSCSI RAID enclosure address settings when there is a controller in the master enclosure: 1. The enclosure containing the array controller is the master enclosure. The PVA SCSI ID switch setting for the master enclosure is always 0. 2.

  • Page 41: Starting The Subsystem

    Operating the UltraSCSI Enclosure Starting the Subsystem After installing the departmental server cabinet or data center cabinet and connecting the enclosures, you can apply power to start the subsystem. Applying power to all the enclosures causes the EMU, PVA, and array controller to automatically begin system operation.

  • Page 42: Figure 2-2 Ac Power Distribution

    Operating the UltraSCSI Enclosure Figure 2–2 AC Power Distribution AC Input Power Controller AC Input Power Controller and SBB Shelf Power Supply Locations Power Power bus A bus B Shelf 4 19 20 21 22 23 24 Shelf 3 13 14 15 16 CXO5113A Shelf 2 Shelf 1...

  • Page 43: Shutting Down The Subsystem

    Operating the UltraSCSI Enclosure Shutting Down the Subsystem Shutting down the subsystem involves (1) Clearing the cache module and shutting down the controller. (2) Either turning O the dc power in an enclosure (the standby power mode) or turning O the ac power controllers (full power shutdown).

  • Page 44: Using The Power Standby Mode

    Operating the UltraSCSI Enclosure Using the Power Standby Mode Complete the procedure in Table 2–2 to place the subsystem in standby power mode (that is, turning off the dc power distribution) Table 2–2 Turning Off the DC Power 1. Clear the cache module and shut down the array controller (see the array controller documentation).

  • Page 45: Applying Dc Power

    Operating the UltraSCSI Enclosure Applying DC Power Complete the procedure in Table 2–3 to restore the dc power within each enclosure. Table 2–3 Turning On the DC Power 1. When there are no expansion enclosures, go to Step 3. 2. Momentarily press the EMU alarm control switch (C 2) on ALLOUT each expansion enclosure.

  • Page 46: Turning Off The Subsystem

    Operating the UltraSCSI Enclosure Turning Off the Subsystem Adding enclosures or moving the subsystem may require removing all power from the subsystem. Complete the procedure in Table 2–4 to remove all power. Table 2–4 Turning Off the Subsystem Power 1. Shut down the array controller, press and hold the PVA standby power switch (C 1) on an expansion enclosure until the ALLOUT...

  • Page 47: Turning On The Subsystem Power

    Operating the UltraSCSI Enclosure Turning On the Subsystem Power After completing subsystem expansion or moving the subsystem, complete the procedure in Table 2–5: Table 2–5 Turning On the Subsystem Power 1. When there are no expansion enclosures, go to Step 4. 2.

  • Page 48: Error Detection, Reporting, Analysis

    Operating the UltraSCSI Enclosure Error Detection, Reporting, Analysis The EMU and PVA constantly monitor the operational status of the enclosure and its components. In some instances, automatic corrective action implementation occurs. Status changes can be reported to the user using a combination of LEDs, the EMU audible alarm, and an optional maintenance terminal connected to the array controller.

  • Page 49: Enclosure Status

    Operating the UltraSCSI Enclosure Enclosure Status _____________________ Note ______________________ HSZ70-series controllers can process the enclosure status signals. Other adapters and controllers may not have this capability. ________________________________________________ The primary elements of the enclosure status are the enclosure power and the blowers. Loss of either a dc voltage or a blower is an error condition. The enclosure notifies the user of the problem by sounding an audible alarm and changing the status LED displays (see Table 2–7).

  • Page 50: Figure 2-4 Pedestal Status Leds

    Operating the UltraSCSI Enclosure The status LEDs (see Figure 2–4) are in the upper right corner of the pedestal. Figure 2–4 Pedestal Status LEDs System OK (Green) Fault (Amber) CXO5451B The green LED is the System OK LED and the amber LED is the system fault LED.

  • Page 51: Table 2-7 Enclosure Status Led Displays

    Operating the UltraSCSI Enclosure Table 2–7 Enclosure Status LED Displays When the LED display is Data Dept. The enclosure status is… Center Server Cabinet Cabinet LED is ON The enclosure is operating normally. There are no detected errors. LED is OFF There are one or more failed components.

  • Page 52: Sbb Shelf Status

    Operating the UltraSCSI Enclosure SBB Shelf Status The two green LEDs on each power supply (see Figure 2–5) display the blower, the power bus, and the individual power supply status. Normally, both these LEDs are O The shelf status LED is O when all the power supplies and all the blowers are operational.

  • Page 53: Sbb Failure

    Operating the UltraSCSI Enclosure • When data is not being transferred, there is no array controller response to SBB removal. • When data is being transferred, the array controller responds to SBB removal by verifying the data validity. When you install a replacement device in a configured subsystem, the array controller ensures that the replacement device type is identical to the one removed.
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  • Page 55: Environmental Monitoring Unit (Emu)

    Environmental Monitoring Unit (EMU) The primary function of the EMU (Figure 3–1) is to monitor, process, report, and display power distribution, temperature, blower, configuration, SCSI addressing, I/O module, communications, and microcode status information. The EMU and the array controller can exchange and process some of this information.

  • Page 56: Product Description

    Environmental Monitoring Unit (EMU) Product Description The EMU identifies enclosure error conditions and configuration faults, and notifies the user of existing or impending failures, using one or more of the following error reporting systems: • EMU LEDs • EMU audible alarm •...

  • Page 57: Controller Status

    Environmental Monitoring Unit (EMU) In some instances, such as a blower failure, a high intake air temperature, or a high internal enclosure (exhaust) temperature, the EMU can automatically initiate a corrective action. For example, operating the blowers at high speed. When there is the possibility of component damage due to overheating, the EMU can turn off the enclosure power.

  • Page 58: I/O Module Status

    Environmental Monitoring Unit (EMU) I/O Module Status The EMU also ensures that the six I/O modules are present, properly installed, and communicating with the backplane, and that TERMPOWER is at the correct level. The EMU reports an error condition whenever any of these conditions occurs.

  • Page 59: Emu Front Panel

    Environmental Monitoring Unit (EMU) EMU Front Panel The EMU user interface controls, connectors, and LED displays are on the front panel. Use Figure 3–3 and the following sections to identify, and determine the function of each component. Figure 3–3 EMU Major Component Locations CXO5774A 1.

  • Page 60: Temperature Fault Led

    Environmental Monitoring Unit (EMU) • This LED is F whenever the EMU has one or more fault codes LASHING to display. • When the alarm control LED is F , momentarily pressing the LASHING EMU alarm control switch turns O the audible alarm and starts the fault code LED display.

  • Page 61: Blower Fault Leds

    Environmental Monitoring Unit (EMU) Blower Fault LEDs One or more of these eight, amber blower fault LEDs (C 6) are O ALLOUT whenever one of the following conditions exists: • One or more blowers are not operating. • One or more blowers are not operating at the correct speed. •...

  • Page 62: Connecting The Emu Communication Bus

    Environmental Monitoring Unit (EMU) Connecting the EMU Communication Bus In an expansion configuration you must establish communications between the master EMU and each expansion EMU. To establish communications you must connect a communication port on each EMU to a communication port on another EMU (see Figure 3–4).

  • Page 63: Emu Firmware

    Environmental Monitoring Unit (EMU) EMU Firmware The EMU firmware enables you to use CLI commands to establish limits for EMU functions such as temperature and blower speed control. The different versions determine the specific commands or functions available. The EMU compares the temperature sensor readings and the blower speed readings against the limits you entered.

  • Page 64: Setting The Temperature Sensors

    Environmental Monitoring Unit (EMU) Setting the Temperature Sensors There are three temperature sensors in each UltraSCSI enclosure • Two on the rear of the backplane in the top middle • One mounted on the EMU module You have the option of setting the temperature at which an individual sensor reports an overtemperature condition.

  • Page 65: Table 3-2 Emu Set Point Temperature Conversions

    Environmental Monitoring Unit (EMU) Table 3–2 EMU Set Point Temperature Conversions °F °C °F °C °F °C °F °C °F °C UltraSCSI RAID Enclosure 3–11...

  • Page 66: Table 3-3 Temperature Set Point Rules

    Environmental Monitoring Unit (EMU) Table 3–3 Temperature Set Point Rules 1. Enter all temperatures in degrees Centigrade (°C). You cannot enter temperatures as fractions, decimals, or degrees Fahrenheit (°F). 2. The EMU set point (sensor_3) temperature must be a minimum of 6°C (11°F) greater than the highest expected ambient (intake) temperature.

  • Page 67: Setting The Blower Speed Control

    Environmental Monitoring Unit (EMU) Setting the Blower Speed Control The UltraSCSI enclosure blowers normally operate at low speed and provide sufficient air flow to cool the enclosure components and ensure proper operation. Use the CLI set emu fanspeed command to change the operating speed of the blowers.

  • Page 68: Emu Status Reporting

    Environmental Monitoring Unit (EMU) • Turn on the amber system fault LED whenever the temperature exceeds a set point • Turn on the amber temperature fault LED • Notify the array controller of the error condition • Start the EMU timer when (1) all blowers in a bank are defective, or (2) a blower is removed •...
  • Page 69 Environmental Monitoring Unit (EMU) The EMU processes two types of problems: • An error condition involving the failure of a component or conditions outside the predetermined environment, such as an overtemperature condition. When there is an error condition the system fault LED is O .

  • Page 70: Subsystem Status Leds

    Environmental Monitoring Unit (EMU) • A different fault occurs • An existing fault clears and reoccurs • An error condition still exists after 1 hour. This causes he audible alarm to sound for approximately 5 seconds once every hour. When you press and hold the switch for at least 5 seconds you clear all the fault codes displays.

  • Page 71: Monitoring Power Supply Operation

    Environmental Monitoring Unit (EMU) Monitoring Power Supply Operation Even when there are four operational power supplies, it is possible that a power supply problem will cause one or both of the dc voltages to be too low. Both the PVA and the EMU monitor power supply operations to ensure that the dc voltages are within the ranges specified in Table 3–5.

  • Page 72: Table 3-6 Emu Status Displays

    Environmental Monitoring Unit (EMU) ______________________Note _____________________ It is not practical to display all the possible LED display combinations. For example, there are eight displays for the failure of an individual blower. Therefore, Table 3–6 lists only a representative sampling of the possible displays. ________________________________________________ Table 3–6 EMU Status Displays EMU Status...
  • Page 73 Environmental Monitoring Unit (EMU) Table 3–6 EMU Status Displays (Continued) EMU Status EMU LED Display Overtemperature Condition CXO5779A Probable Cause 1—A temperature in one or more enclosures is above the user specified limit. Determine and correct the cause of this condition quickly prevent the overtemperature condition from causing a subsystem RESET or failure.
  • Page 74 Environmental Monitoring Unit (EMU) Table 3–6 EMU Status Displays (Continued) EMU Status EMU LED Display Missing Blower Fault Multiple Blower Faults Operational blowers are running at high speed. CXO5782A Probable Cause 1—A blower is removed. Replace the missing blower. Probable Cause 2—All blowers in one bank are not operating. Remove and install blowers correctly within 8 minutes.

  • Page 75: Configuration Fault Code Reporting

    Environmental Monitoring Unit (EMU) Configuration Fault Code Reporting The system fault, temperature, power, and blower LEDs, cannot display all the possible system faults. Therefore, a F system fault LED LASHING indicates that there are system faults. To determine what the system fault is you must observer the hexadecimal code displayed on the blower LEDs in binary format.

  • Page 76: Table 3-7 Emu Fault Code Displays

    Environmental Monitoring Unit (EMU) Table 3–7 EMU Fault Code Displays Fault Code, Cause, EMU LED Display Corrective Action Fault Code 01 One of the following Boot ROM error conditions exist: CXO5760A 1. A Boot ROM Signature failure. Replace the EMU. 2.
  • Page 77 Environmental Monitoring Unit (EMU) Table 3–7 EMU Fault Code Displays (Continued) Fault Code, Cause, EMU LED Display Corrective Action Fault Code 04 Master EMU cannot communicate with expansion EMU. CXO5763A 1. Ensure PVA SCSI ID switches settings are as follows: •...
  • Page 78 Environmental Monitoring Unit (EMU) Table 3–7 EMU Fault Code Displays (Continued) Fault Code, Cause, EMU LED Display Corrective Action Fault Code 07 Invalid configuration. Requires an array controller specific action. CXO5766A Fault Code 08 Two PVA SCSI ID switch settings are the same.
  • Page 79 Environmental Monitoring Unit (EMU) Table 3–7 EMU Fault Code Displays (Continued) Fault Code, Cause, EMU LED Display Corrective Action Fault Code 0B Controller fault. Requires an array controller specific action (see the array controller documentation). CXO5770A Fault Code 0C One or more defective power supplies.
  • Page 80 Environmental Monitoring Unit (EMU) Table 3–7 EMU Fault Code Displays (Continued) Fault Code, Cause, EMU LED Display Corrective Action Fault Code 0F Initial Display Less than four operational power supplies. Replace the defective power supplies. Comment—The EMU places the system in the standby power mode CXO5784A Standby Power Mode Display CXO5815A...

  • Page 81: Replacing An Emu

    Environmental Monitoring Unit (EMU) Replacing an EMU To remove an EMU complete the procedure in Table 3–8. To install an EMU complete the procedure in Table 3–9. Table 3–8 Removing an EMU 1. Shut down the system by clearing the cache module and shutting down the controller. 2.
  • Page 82 Environmental Monitoring Unit (EMU) Table 3–9 Installing an EMU (Continued) 2. Align the EMU with left hand slot. CXO5754A 3. Insert the EMU into the slot and push it in until the extractor latches engage the enclosure. 4. For an expansion configuration use a BN26M-series cable (see Table 3–10) to connect the EMU—EMU communications bus.

  • Page 83: Table 3-10 Emu Communications Cables

    Environmental Monitoring Unit (EMU) Table 3–10 EMU Communications Cables Length Part Description Meters Feet Number 8-conductor 24 AWG, PVC, round cable assembly BN26M–0E with: BN26M–01 2 each, 8 position (8MP) locking, plug BN26M–03 connectors 13.0 BN26M–04 BN26M–07 CXO5747A UltraSCSI RAID Enclosure 3–29...
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  • Page 85: Power Verification And Addressing (Pva)

    Power Verification and Addressing (PVA) The PVA (power verification and addressing) assembly (Figure 4–1) and the associated EMU monitors the status of the major UltraSCSI enclosure components to verify proper operation. When an error or fault condition occurs, these modules notify the user, and, in some instances, the array controller, that a problem exists.

  • Page 86: Product Description

    Power Verification and Addressing (PVA) The PVA and EMU mount next to each other in the enclosure—the EMU on the left and the PVA on the right (see Figure 4–2). Figure 4–2 PVA Location CXO5754A Product Description Figure 4–3 identifies the major PVA components. Figure 4–3 PVA Major Components CXO5821A 1.

  • Page 87: Functions

    Power Verification and Addressing (PVA) The PVA has two status indicators: • A green power status LED in the power switch This LED is O whenever both there at least four operational power supplies. When an error condition occurs, the LED is O This switch can initiate the standby power mode when the array controller is inactive.

  • Page 88: Sbb Device Ids

    Power Verification and Addressing (PVA) ____________________ Caution ____________________ Removing both the EMU and PVA at the same time will cause the system to RESET. ________________________________________________ SBB Device IDs The 24 disk drives in each enclosure are arranged on six vertical buses in four horizontal shelves.

  • Page 89: Monitoring Power Supply Operation

    Power Verification and Addressing (PVA) Use the PVA address switch to establish SCSI bus IDs for all the devices on the same shelf. This switch has eight (0 through 7) positions. Always set the master enclosure switch is to 0. Monitoring Power Supply Operation Even when there are four operational power supplies, it is possible that a power supply problem will cause one or both of the dc voltages to be too...

  • Page 90: Setting The Enclosure Address

    Power Verification and Addressing (PVA) Setting the Enclosure Address Use the procedure in Table 4–2 to identify the enclosure as either a master or an expansion enclosure. This switch also establishes the SCSI bus address (device ID) for the disk drives (SBBs) in the enclosure. The following restrictions apply to establishing the enclosure address: 1.

  • Page 91: Master Enclosure Address

    Power Verification and Addressing (PVA) Table 4–3 DIGITAL Supported Enclosure Addresses No. of Enclosures Master Expansion 1 Expansion 2 None None None Master Enclosure Address The master enclosure address is always 0 that establishes the SBB SCSI bus IDs shown in Figure 4–5. Figure 4–5 Master Enclosure SCSI Bus IDs SCSI bus CXO-4840A-MC...

  • Page 92: Expansion Enclosure Addresses

    Power Verification and Addressing (PVA) Expansion Enclosure Addresses DIGITAL supports only expansion enclosure address settings 2 (see Figure 4–6) and 3 (see Figure 4–7). ____________________ Caution ____________________ To preclude SCSI bus addressing conflicts, DIGITAL does not support enclosure address settings 1, 4, 5, 6, or 7 for systems with HSZ70-series controllers.

  • Page 93: Implementing The Standby Power Mode

    Power Verification and Addressing (PVA) Figure 4–7 Enclosure Address 3 SCSI Bus IDs SCSI bus CXO-4843A-MC CXO5777A Implementing the Standby Power Mode A major function of the PVA is implementing the standby power mode. This mode removes dc power from all components except the EMU alarm control switch.

  • Page 94: Table 4-4 Turning Off The Dc Power Distribution

    Power Verification and Addressing (PVA) Table 4–4 Turning Off the DC Power Distribution 1. Clear the cache module and shut down the array controller as described in the array controller documentation. 2. Shut down the array controller, press and hold the PVA standby power switch (C 1) on an expansion enclosure until the ALLOUT...

  • Page 95: Replacing A Pva

    Power Verification and Addressing (PVA) Replacing a PVA Complete the procedures in Table 4–6 and Table 4–7 to replace a defective PVA. Complete the procedure in Table 4–7 when assembling an UltraSCSI RAID enclosure. Table 4–6 Removing a PVA 1. Shut down the array controller and turn off power in the enclosure. 2.

  • Page 96: Table 4-7 Installing A Pva

    Power Verification and Addressing (PVA) Table 4–7 Installing a PVA 1. Remove the PVA from the shipping container and verify that it is a model DS–BA35X–EC. CXO5737A 2. Align the PVA with the right hand slot. CXO5754A 3. Insert the PVA into the slot and push it in until the extractor latches engage the enclosure.

  • Page 97: Single-Ended I/O Modules

    Single-Ended I/O Modules The single-ended I/O modules (see Figure 5–1) have two functions: • Providing termination for both the internal and external SCSI buses • Establishing SCSI bus communications between Figure 5–1 Single-Ended I/O Module CXO5816A ___________________ Caution _____________________ Not all array controllers support an UltraSCSI RAID subsystem with more than one enclosure.

  • Page 98: Figure 5-2 I/O Module Location

    Single-Ended I/O Modules ____________________ Caution ____________________ I/O modules provide termination for both the internal and the external SCSI buses. Therefore, you must install the same type, operational I/O modules on each of the six enclosure connectors. ________________________________________________ The six I/O modules mount on the bottom rear (see Figure 5–2) of the enclosure.

  • Page 99: Replacing I/O Modules And Cables

    Single-Ended I/O Modules Replacing I/O Modules and Cables Replacing an I/O module or a cable without first shutting down the controller can adversely affect data integrity. Removal of the I/O module causes the EMU to report the following error conditions to the controller: (1) Installation of different I/O modules.

  • Page 100: Controlling The Internal Scsi Bus

    Single-Ended I/O Modules Controlling the Internal SCSI Bus The I/O module controls the internal SCSI bus in the following manner: • Isolates the internal SCSI bus from the external SCSI bus • Provides single-ended SCSI bus termination for each internal bus •...

  • Page 101: Error Reporting

    Single-Ended I/O Modules Error Reporting The EMU monitors the status of the I/O modules for the following error conditions: • The installation of incompatible I/O modules • A TERMPOWER problem Incompatible I/O Modules An I/O module error condition exists whenever any of the following conditions exists: •...

  • Page 102: Termpower Errors

    Single-Ended I/O Modules TERMPOWER Errors The I/O module displays the TERMPOWER status for both the internal and the external bus (see Figure 5–4). Figure 5–4 I/O Module TERMPOWER LEDs External Internal TERMPOWER TERMPOWER CXO5829A The nominal TERMPOWER for both buses is +5 V dc. •...

  • Page 103: Rules For Expanding An Ultrascsi Bus

    Single-Ended I/O Modules Rules for Expanding an UltraSCSI Bus By connecting the master enclosure to one or two expansion enclosures, you can expand the SCSI bus from a 4-device bus to an 8-device or 12–device bus. See Chapter 4, “Power Verification and Addressing Assembly,” for a discussion of the valid enclosure SCSI bus addresses and the associated array controller and storage device SCSI bus IDs.

  • Page 104: Cabling An Ultrascsi Subsystem

    Single-Ended I/O Modules Table 5–2 UltraSCSI Bus Expansion Rules 1. The I/O module numbers (1–6) match the enclosure SCSI bus numbers and the array controller port numbers. CXO5819A 2. Always connect the cables between the I/O modules in the same location on the same bus.

  • Page 105: Preliminary Procedures

    Single-Ended I/O Modules Before beginning the installation, you must complete the preliminary procedures, select the UltraSCSI VHDCI cables, and shut down the subsystem. Preliminary Procedures Complete the procedure in Table 5–3 before installing the cables. Table 5–3 Preliminary Cabling Procedures 1.

  • Page 106: Selecting An Ultrascsi Vhdci Cable

    Single-Ended I/O Modules Selecting an UltraSCSI VHDCI Cable You can use the cables listed in Table 5–4 to connect devices or cables with 68-pin VHDCI receptacle connectors. Table 5–4 UltraSCSI Bus Cables Length Order Description Meters Feet Number 68-conductor SCSI cable with: BN37A–0C 2–VHDCI BN37A–0E...

  • Page 107: Shutting Down The Subsystem

    Single-Ended I/O Modules Shutting Down the Subsystem To protect data and the devices you must complete the procedures in Table 5–5 before you begin installing the cables. Table 5–5 Shutting Down the UltraSCSI Subsystem 1. On the host dismount the UltraSCSI RAID subsystem disk drives. 2.

  • Page 108: Cabling A Three-Enclosure Subsystem

    Single-Ended I/O Modules Cabling a Three–Enclosure Subsystem ____________________ Caution ____________________ Not all array controllers support an UltraSCSI RAID subsystem with more than one enclosure. Read the array controller documentation to ensure the controller supports expanded configurations. ________________________________________________ ______________________Note _____________________ Each bus requires two BN37A cables, a total of 12 cables. ________________________________________________ Complete the procedure Table 5–6 for the I/O modules on each SCSI bus starting with SCSI bus 1.

  • Page 109: Table 5-6 Installing Three Enclosure Subsystem Cables

    Single-Ended I/O Modules Table 5–6 Installing Three Enclosure Subsystem Cables 1. Shut down the array controller (see Table 5–5). Use a screwdriver to loosen the two, spring-loaded mounting screws on the I/O module. 2. Grasp the module by the cable support bracket and pull it directly to the rear and remove it from the enclosure shroud.
  • Page 110 Single-Ended I/O Modules Table 5–6 Installing Three Enclosure System Cables (Continued) 6. On an expansion I/O module, align the Cable A with the left connector. Gently insert the cable connector into module connector. Tighten both cable connector thumb screws to fully seat the connector.

  • Page 111: Table 5-7 Turning On The Ultrascsi Subsystem

    Single-Ended I/O Modules Table 5–6 Installing Three Enclosure System Cables (Continued) 9. Install a wire tie through the holes on the cable support bracket and around the cable. Tighten the wire tie. 10. Align the I/O module with the Port 1 backplane connector in the second expansion enclosure shroud.

  • Page 112: Cabling A Two-Enclosure Subsystem

    Single-Ended I/O Modules Cabling a Two–Enclosure Subsystem ____________________ Caution ____________________ Not all array controllers support an UltraSCSI RAID subsystem with more than one enclosure. Read the array controller documentation to ensure the controller supports expanded configurations. ________________________________________________ Complete the procedures in Table 5–8 to connect the master enclosure to one expansion enclosure.
  • Page 113 Single-Ended I/O Modules Table 5–8 Installing Two Enclosure System Cables (Continued) 4. On the first (master) I/O module, align the Cable A connector with the left connector. Cable A CXO5854A Gently insert the cable connector into module connector. Tighten both cable connector thumb screws to fully seat the connector. Install a wire tie through the holes on the cable support bracket and around the cable.
  • Page 114 Single-Ended I/O Modules Table 5–8 Installing Two Enclosure System Cables (Continued) 7. Align the Cable B connector with the right connector. Gently insert the cable connector into module connector. Tighten both cable connector thumb screws to fully seat the connector. Install a wire tie through the holes on the cable support bracket and around the cable.

  • Page 115: Replacing An I/O Module

    Single-Ended I/O Modules Replacing an I/O Module Complete the procedure in Table 5–9 to remove I/O modules. Complete the procedure in Table 5–10 to install I/O modules when assembling an enclosure or replacing an individual module. ___________________ Caution _____________________ To prevent interrupting a data transfer or losing data, shut down the subsystem before removing an I/O module.
  • Page 116 Single-Ended I/O Modules Table 5–10 Installing an I/O Module 1. Remove the I/O module from the shipping container and verify that it is a model DS–BA35X–MN. 2. Align the left cable with the I/O module connector. 3. Gently insert the cable connector into module connector. Tighten both cable connector thumb screws to fully seat the connector.

  • Page 117: Replacing A Cable

    Single-Ended I/O Modules Replacing a Cable ___________________ Caution _____________________ Not all array controllers support an UltraSCSI RAID subsystem with more than one enclosure. Read the array controller documentation to ensure the controller supports expanded configurations. ________________________________________________ Complete the procedure in Table 5–11 to remove expansion cable. Complete the procedure in Table 5–12 to install cables when assembling an enclosure or replacing an individual cable.
  • Page 118 Single-Ended I/O Modules Table 5–11 Removing an Expansion Cable 1. Shut down the array controller (Table 5–5). Use a screwdriver to loosen the two, spring-loaded mounting screws on the I/O module. 2. Grasp the module by the cable support bracket and pull it directly to the rear and remove it from the enclosure shroud.
  • Page 119 Single-Ended I/O Modules Table 5–12 Installing an Expansion Cable 1. Remove the expansion cable from the shipping container and verify that it is proper type and length. 2. Align the left cable with the I/O module connector. 3. Gently insert the cable connector into module connector. Tighten both cable connector thumb screws to fully seat the connector.
  • Page 120 SES Template Word 7 Blank Page Fix by Peter LaQuerre...

  • Page 121: Power Distribution

    Power Distribution This chapter describes the UltraSCSI RAID enclosure power distribution to include the following: • The enclosure power system and components (see Figure 6–1) • Power distribution configurations (standard, redundant, optimum) • Configuring the power distribution • Error detection and reporting •...

  • Page 122: Power System Overview

    Power Distribution ______________________Note _____________________ Proper operation of the controller cache modules requires external cache batteries (ECBs). The array controller documentation discusses how to use the ECBs. ________________________________________________ Power System Overview In any RAID subsystem a consideration is the elimination of single points of failure.

  • Page 123: N+4 (Redundant)

    Power Distribution n+4 (Redundant) This configuration has four redundant power supplies for a total of eight power supplies. Two power controllers distribute ac power to four supplies on power bus A and power bus B. This configuration requires only one ac power source.

  • Page 124: Ac Input Power Controller

    Power Distribution AC Input Power Controller The ac power distribution is through the power controller (see Figure 6–2) to the shelf power supplies. The O –O switch on each power controller controls the ac distribution to the associated power bus (A or B). These power controllers are completely interchangeable and there are no physical or electrical differences between them.

  • Page 125: Shelf Power Supplies

    Power Distribution Shelf Power Supplies ___________________ Caution ____________________ The UltraSCSI RAID enclosure requires shelf power supplies rated for at least 180 W, such as the model DS–BA35X–HH shelf power supplies. Other supplies, such as the 150 W power supply, model BA35X–HF, can not be used. ________________________________________________ The shelf power supply converts the ac voltage to +5 V dc and +12 V dc and distributes these voltages throughout the RAID enclosure.

  • Page 126: Ac Power Buses

    Power Distribution AC Power Buses AC power distribution to the UltraSCSI shelf power supplies is over two buses–bus A and bus B (see Figure 6–4). Each bus has an ac power source, a separate power controller, power supplies, and power cords. Although bus A, the n+1 configuration, can operate the system, DIGITAL recommends using both buses, the optimum power configuration (n+4) with two ac power sources.

  • Page 127: Standard (N+1) Power Configuration

    Power Distribution Standard (n+1) Power Configuration This power configuration distributes ac power over power bus A to five power supplies located in positions 1A through 5A. Power bus A uses the black power cords on the left side of the enclosure and on the upper right corner (see Figure 6–5).

  • Page 128: Redundant (N+4) Power Supply Configurations

    Power Distribution Redundant (n+4) Power Supply Configurations This power configuration distributes ac power over both the power buses (A and B). See Figure 6–6. Each bus has four power supplies. To implement this configuration from an n+1 configuration requires the user to order the following additional components: •...

  • Page 129: Optimum (N+4) Power Supply Configurations

    Power Distribution Optimum (n+4) Power Supply Configurations The only difference between this configuration and the redundant (n+4) configuration is the use of separate ac power sources. To implement this configuration from a standard n+1 configuration requires the user to order the following additional components: •...

  • Page 130: Power Supply Error Condition Reporting

    Power Distribution Power Supply Error Condition Reporting Each shelf power supply has two green LEDs that display the power supply status (see Figure 6–7). Table 6–1 describes the following: • The LED state • The status being reported • The recommended corrective action Figure 6–7 Power Supply Status LEDs POWER STATUS LED...

  • Page 131: Replacing A Power Supply

    Power Distribution Replacing a Power Supply ___________________ Caution _____________________ To protect this sensitive electronic device from electrostatic discharge (ESD) use the following precautions—(1) Wear an ESD wrist strap. (2) Do not touch the printed circuit board or the backplane connector. (3) Do not lay the device on a work surface but place it on an electrostatic mat.
  • Page 132 Power Distribution Table 6–2 Removing a Power Supply 1. To perform a hot swap go to Step 3. 2. To perform a cold swap, turn off the ac power controller. 3. Disconnect the power cord from the front of the SBB. 4.

  • Page 133: Power Controller Error Condition Reporting

    Power Distribution Table 6–3 Installing a Shelf Power Supply 1. Remove the supply from the electrostatic shipping container and verify that it is a 180 W power supply by checking the bezel label. 2. Lay the supply on a flat surface. CXO-4314A-MC 3.

  • Page 134: Replacing A Power Controller

    Power Distribution Replacing a Power Controller Complete the procedure in Table 6–4 to remove a power controller. Complete the procedure in Table 6–5 when assembling the UltraSCSI enclosure or replacing a single power controller. ___________________ WARNING __________________ Only qualified service personnel can replace an ac power controller.
  • Page 135 Power Distribution Complete the procedure in Table 6–4 to remove an ac power controller. Table 6–4 Removing an AC Input Power Controller 1. Press on the ON/OFF switch. 2. Disconnect the ac power cord. 3. Loosen the two retaining screws. AC Power Entry Controller A Retaining...
  • Page 136 Power Distribution Table 6–5 Installing an AC Power Controller 1. Remove the power controller from the shipping container and verify that it is a model DS–BA35X–HE. CXO5113A 2. Press on the ON/OFF switch to turn the power controller OFF. 3. Align the first power controller with either slot A or slot B in the lower left corner of the RAID enclosure.

  • Page 137: Storage Devices

    Storage Devices This chapter describes the procedures for handling, addressing, identifying, and replacing StorageWorks building block (SBB) disk drives in an UltraSCSI RAID enclosure. Also described are error conditions and the associated LED displays. ___________________ Caution _____________________ The DIGITAL UltraSCSI RAID enclosure supports 3.5-inch disk drive SBBs.

  • Page 138: Handling An Sbb

    Storage Devices Handling an SBB Figure 7–1 defines the proper methods for handling an SBB to prevent damage. Figure 7–1 SBB Handling Rules Set the SBB on its side. Do NOT set the SBB on its edge. Set the SBBs side by side. Do NOT stack SBBs.

  • Page 139: Sbb Device Address

    Storage Devices SBB Device Address Determining the SBB device address is a function of the following: • The PVA–determined enclosure address (0, 2, or 3) • The SBB enclosure shelf location SBB Status Reporting StorageWorks shelves monitor the status of the storage SBBs. When a fault occurs, the fault and the SBB device address (SCSI target ID) are reported to the array controller or host for processing The SBB LEDs define the status of the individual SBBs.
  • Page 140 Storage Devices • The amber LED is the storage SBB fault status LED and indicates an error condition when it is either on or flashing. The SCSI bus controller controls this LED. See Table 7–1 for definitions of the LED displays. Table 7–1 SBB Status LED Displays When the LED display...

  • Page 141: Identifying A Storage Device

    Storage Devices Identifying a Storage Device To determine the model number of a device see the regulatory label (see Figure 7–3) on the side of the SBB or the SBB identification label (see Figure 7–4) on the bezel. Figure 7–3 Typical SBB Regulatory Label CXO5916A The SBB bezel label includes the following device information: •...
  • Page 142 Storage Devices Figure 7–4 Typical SBB Bezel Label DS-RZ1CB-VW 4.3 GB LUN # ID # CH # CXO5917A 1. The device model number. 2. The device storage capacity. 3. The user-assigned SCSI logical unit number (LUN). 4. The user-assigned SCSI identification number (target ID). 5.

  • Page 143: Guidelines For Replacing Sbbs

    Storage Devices Guidelines for Replacing SBBs This section describes the items to consider when replacing SBBs. Prerequisites for Replacing an SBB Replacing an SBB is a relatively simple procedure. However, there are several things you must consider. When an array controller initializes a device, it establishes the device’s physical location, the device address, and the logical unit number (LUN).

  • Page 144: Warm Swap

    Storage Devices ____________________ Caution ____________________ Although the HSZ70-series controllers support hot swap, other controllers do not. If you are not positive that your SCSI controller supports hot swap, DIGITAL recommends using warm swap to protect the integrity of your data. Read the array controller documentation to determine which array controller-supported swap method to use.

  • Page 145: The Sbb Connector

    Storage Devices The SBB Connector The StorageWorks SBB connectors ensure that the SBBs will operate reliably even when replaced many times. The SBB has a 96-pin receptacle DIN connector that provides positive mating with the SBB enclosure plug connectors. The connector design ensures that: 1.

  • Page 146: Replacing An Sbb

    Storage Devices Replacing an SBB Complete the procedure in Table 7–2 to remove an SBB. When initially installing SBBs in an enclosure or installing a single SBB, complete the procedure in Table 7–3. Table 7–2 Removing an SBB 1. To perform a hot swap go to Step 4. 2.
  • Page 147 Storage Devices Table 7–3 Installing an SBB 1. Remove the SBB from the shipping container and ensure it is the correct model. CXO-4562A-MC 2. When assembling an UltraSCSI enclosure go to Step 3. To install a single SBB, insert each SBB into the guide slots and push it in until it seats fully and the mounting tabs engage the shelf.
  • Page 148 Storage Devices Table 7–3 Installing an SBB (Continued) 3. When assembling an UltraSCSI enclosure, install all the devices in starting in the lower left corner (shelf 1, SCSI bus 1— devices 1 through 6). Power Power bus A bus B 19 20 21 22 23 24 Shelf 4 Shelf 3...

  • Page 149: Enclosure Blowers

    Enclosure Blowers Ensuring proper UltraSCSI RAID enclosure operation requires establishing and maintaining the proper operating environment. Meeting the temperature and humidity ranges specified in Appendix A, “UltraSCSI Enclosure Specifications,” involves using air conditioning to establish and maintain the proper external, that is the ambient, environment. Failure to achieve these goals could cause components to malfunction thereby causing the comprising data integrity.
  • Page 150 Enclosure Blowers Figure 8–1 Enclosure Blower Assemblies Locations BANK 2 BANK 1 Blower 5 Blower 1 Blower 6 Blower 2 Blower 7 Blower 3 Blower 8 Blower 4 CXO-5494A-MC The temperature sensors in the enclosure (see Chapter 3, “Environmental Monitoring Unit”) detect overtemperature conditions or blower malfunctions and alert the user to the problem.

  • Page 151: Function And Operation

    Enclosure Blowers Function and Operation Cooling the components is accomplished by pulling in air through the front of each component, over the internal circuitry, through the backplane, and exhausting it out the rear of the enclosure. The +12 V dc for blower operation is available on each of the backplane blower connectors.

  • Page 152: Error Condition Reporting

    Enclosure Blowers Error Condition Reporting The EMU LEDs display both blower and overtemperature error conditions. See Table 3–6 for the blower error conditions and the recommended corrective action. Replacing a Blower When there is a malfunctioning blower the other blowers operating at high speed increases air flow through the components enough to permit continued operation without corrupting or losing data.
  • Page 153 Enclosure Blowers Table 8–1 Removing a Blower 1. Use both hands to firmly press the upper and lower blower mounting tabs together to release the blower. Connector Guide Upper mounting Lower mounting tab (not shown) CXO5753A 2. Pull the defective blower straight out. 3.
  • Page 154 Enclosure Blowers Table 8–2 Installing a Blower Assembly 1. Remove the blower from the electrostatic shipping container and verify that it is a model DS–BA35X–MK. 2. Orient the replacement blower so that the connector and guide pin align with the backplane blower connector. Connector Guide Upper...

  • Page 155: A Ultrascsi Enclosure Specifications

    UltraSCSI Enclosure Specifications This appendix defines the physical, electrical, and environmental specifications for the DIGITAL StorageWorks UltraSCSI enclosure with 24 disk drives (SBBs) and the following major electronic components: CXO5555A 1. DS–BA370 Enclosure 6. Cache Module (2 each) 2. Blowers (8 each) 7.

  • Page 156: Physical And Electrical Specifications

    UltraSCSI Enclosure Specifications ______________________Note _____________________ The operating and servicing physical specifications as well as the electrical specifications of the UltraSCSI RAID enclosure are cabinet and configuration specific. ________________________________________________ Physical and Electrical Specifications The following specifications apply to a single, Ultra SCSI enclosure with all the components installed: Shipping Dimensions Installed Dimensions...

  • Page 157: Operating Environments

    UltraSCSI Enclosure Specifications Operating Environments DIGITAL recommends maintaining the following environments to ensure proper operation of this product. Condition Specification Optimum Operating Environment (Suggested for optimum operation) Temperature 18°C to +24°C (+64°F to +75°F) with an average rate of change of 3°C/hour maximum and a step change of 3°C or less Relative humidity...
  • Page 158 UltraSCSI Enclosure Specifications SBB Thermal Stabilization For proper operation upon initial power application, the DIGITAL SBB storage device temperature should be within the range of 18-29°C (65-85°F). ____________________ Caution ____________________ Always stabilize disk drives in the operating environment before installation or operation. Otherwise, applying power can damage the media or associated.

  • Page 159: B Assembling An Ultrascsi Raid Subsystem

    Assembling an UltraSCSI RAID Subsystem Assembling an UltraSCSI RAID subsystem requires sequentially installing the components in a DS–BA370–series rack-mountable enclosure. You can mount these enclosures in either a departmental cabinet, a “pedestal,” or a data center cabinet (SW600–series), and then testing the subsystem for proper operation.

  • Page 160: Installation Sequence

    Assembling an UltraSCSI RAID Enclosure Installation Sequence The basic installation sequence is the same for all UltraSCSI RAID subsystems, whether they use one, two, or three DS–BA370 enclosures. To reduce the possibility of multiple, interacting problems the preferred assembly sequence is as follows: 1.

  • Page 161: Installing The Power System

    Assembling an UltraSCSI RAID Enclosure Installing the Power System The ac power controllers and shelf power supplies comprise the enclosure power system. CXO5800A ___________________ Caution ____________________ To prevent ESD (electrostatic discharge), do not touch the connector. ________________________________________________ _____________________ Note ______________________ The ac power controller has no user serviceable components.

  • Page 162: Installing The Emu

    Assembling an UltraSCSI RAID Enclosure Installing the EMU Each UltraSCSI enclosure requires an EMU for proper operation. In an expansion configuration you must also connect the EMU—EMU communications ports between the master EMU and all the expansion EMUs. Complete the following procedure to install an EMU. There are two steps to installing an EMU: 1.

  • Page 163: Installing The I/O Modules

    Assembling an UltraSCSI RAID Enclosure Installing the I/O Modules The six single-ended I/O modules (DS–BA35X–MN) mount on the lower rear of the enclosure. Ports CXO5805A In an expanded subsystem, connect the cables to the I/O modules (see Table 5–12) and then install the I/O modules in the enclosures (see Table 5–10).

  • Page 164: Installing Controller "A

    Assembling an UltraSCSI RAID Enclosure Installing Controller “A” The UltraSCSI master enclosure contains the array controllers and cache modules. You cannot install the ECBs (external cache batteries) in the enclosure. In a departmental cabinet, you install the ECBs in the top cover. In a data center cabinet, you install the ECBs in a shelf mounted in the cabinet.
  • Page 165 Assembling an UltraSCSI RAID Enclosure Controller A Installation 1. Complete the sequential installation of the following UltraSCSI enclosure components: a) Power controllers and power supplies b) EMU c) PVA d) Disk Drives e) I/O Modules UltraSCSI expansion cables 2. Align controller “A” with the top controller slot (device address 7). Power Power bus A...
  • Page 166 Assembling an UltraSCSI RAID Enclosure Controller A Installation (Continued) 3. Insert the array controller into the slot and push it in until the extractor latches engage the enclosure. CXO5602A 4. Push in on the extractor latches to firmly seat the array controller. 5.

  • Page 167: Installing Controller "B

    Assembling an UltraSCSI RAID Enclosure Installing Controller “B” The following procedure describes the mechanical procedures for installing an array controller and a cache module. You must configure the subsystem using the procedures in the following publications: • the array controller documentation •...

  • Page 168: Internal Cables

    Assembling an UltraSCSI RAID Enclosure Controller B Installation (Continued) 3. Insert the array controller into the slot and push it in until the extractor latches engage the enclosure. CXO5603A 4. Push in on the extractor latches to firmly seat the array controller. 5.

  • Page 169: Glossary

    Glossary ac distribution The method of distributing ac power within a StorageWorks shelf, enclosure, or cabinet. ac power supply See shelf power supply. adapter See SCSI signal bus converter. ambient air temperature The temperature of the air surrounding the cabinet, enclosure, shelf, or SBB that dissipates the heat generated by the device.
  • Page 170 Glossary bus expander Devices that couple bus segments together without any impact on the SCSI protocol, or the software. These devices include both single-ended to differential and single-ended to single-ended bus extenders. The term extender is a general term that includes “extender,” “repeater” and “isolator.”...
  • Page 171 Glossary The terminator properties (single-ended or differential) determine the bus segment type. Devices that do not have the same transceiver type as the terminators cannot operate in the segment defined by the terminators. cabinet See data center cabinet and departmental server cabinet cable connector Any connector that is physically part of a cable assembly attached to backplanes or other non–device connectors.
  • Page 172 Glossary certified device A storage device tested in a specific configuration and found to be in compliance with either an FCC or a CE certification standard. DIGITAL certifies these devices to operate in a specific shelf, enclosure, or cabinet. channel Another term for a SCSI bus.
  • Page 173 Glossary data center cabinet The largest of the StorageWorks cabinet, such as the SW800-series that can contain as many as 24 SBB shelves. These cabinets include either a 50 Hz or 60 Hz cable distribution unit (CDU), internal ac power cords, and cooling fans.
  • Page 174 Glossary dual bus Configuring a single SBB shelf SCSI bus as two individual buses (a four device bus and a three device bus) creates a bus known as a dual or split bus. External cache battery. electromagnetic interference See EMI. electrostatic discharge See ESD.
  • Page 175 Glossary expansion enclosure An UltraSCSI RAID enclosure connected to the master enclosure with UltraSCSI bus cables. Each subsystem can have a maximum of two expansion enclosures. Set the expansion PVA SCSI bus address switch to either: 2–to establish SCSI bus device addresses 8, 9, 10, and 11. 3–to establish SCSI bus device addresses 12, 13, 14, and 15.
  • Page 176 Glossary host The primary or controlling computer (in a multiple computer network) to which storage is attached. host adapter A device that connects the host system I/O bus (for example, a PCI bus) to the storage SCSI bus. A host adapter performs the lower layers of the SCSI protocol and normally operates in the initiator role.
  • Page 177 Glossary initiator A SCSI device (usually a host system) that requests another SCSI device (a target) to complete an operation. Input/Output module See I/O module. isolator See bus extender. Intake air temperature The temperature of the air entering the cabinet, enclosure, shelf, or SBB. Also referred to as the ambient temperature.
  • Page 178 Glossary MB/sec The bus width (8- or 16-bit), the number of bytes per word (1 or 2, respectively), and the bus clock frequency determines the transfer rate in megabytes per second (MB/sec). megabytes per second See MB/sec. modular carrier The StorageWorks compatible plastic container in which storage devices or power supplies are mounted to form SBBs.
  • Page 179 Glossary power verification and addressing assembly See PVA. Power Verification and Addressing assembly. The module whose primary functions are (1) allow the user to select the enclosure UltraSCSI bus ID, (2) enable the user to place the subsystem in a standby power mode and return it to an operational status.
  • Page 180 Glossary Radio frequency interference. The impairment of a signal by an unwanted radio signal or radio disturbance. StorageWorks building block is basic building block of the product line. Any device conforming to shelf mechanical and electrical standards installed in either a 3.5-inch or 5.25-inch carrier is considered to be an SBB, whether it be a storage device, a power supply, or other device.
  • Page 181 Glossary SCSI device ID The bit-significant representation of the SCSI addressing referring to one of the signal lines numbered 0 through 7 for an 8-bit bus or 0 through 15 for a 16-bit bus. Also known as “target ID”. SCSI domain A SCSI domain is a logical bus consisting of at least one bus segment, at least one initiator, and at least one target.
  • Page 182 Glossary spin-down The process that begins when power is removed from a storage device and data transfer halts, and ends when the device is stopped and can be moved. In the case of disk drives, the heads are retracted and the media is stopped. spin-up The process that begins when power is applied to a storage device, and ends when the device is determined to be operational and ready for data transfer...
  • Page 183 Glossary StorageWorks building block See SBB. subsystem array strategy A strategy, including packaging, devices, and array controllers, that provides an integrated storage subsystem solution. supported device (1) A device that has been fully evaluated in an “approved” StorageWorks configuration (that is, shelf, cabinet, power supply, cabling, and so forth) and is in complete compliance with country-specific standards (for example, FCC, CE-Mark, CSA, TÜV, VDE, and so forth) and with all DIGITAL standards.
  • Page 184 Glossary TERMPOWER The electrical current power required for SCSI bus terminators. This power may be supplied by an external SCSI bus, the shelf power supply or an ac– dc power converter. topology The physical arrangement and relationship of interconnected nodes and SCSI buses in a network.
  • Page 185 Glossary UltraSCSI RAID subsystem One or more UltraSCSI RAID enclosures mounted in either a pedestal or a cabinet. Each subsystem requires a master enclosure. Installing one or two expansion enclosures and interconnecting all the enclosures with UltraSCSI bus cables creates an expanded subsystem. Underwriters Laboratories See UL.
  • Page 186 SES Template Word 7 Blank Page Fix by Peter LaQuerre...

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