Page 1 Part Number: EK–BA370–UG. C02/387403–001 September 1998 The DS–BA370 series UltraSCSI RAID rack-mountable enclosure is the basic building block of UltraSCSI RAID subsystems. This guide and its related publications comprise the basic documentation set for these subsystems. Compaq Computer Corporation Houston, Texas...
Page 2 Compaq, an authorized sublicensor, or the identified licensor. Compaq, DIGITAL, and the Compaq logo Registered in U.S. Patent and Trademark Office. CI, DSSI, and StorageWorks are trademarks of Compaq Computer Corporation.
Page 3: Table Of Contents
Table of Contents Preface ..........xiii Manufacturer’s Declarations .
Page 4 Table of Contents Chapter 2, Operating the UltraSCSI Enclosure UltraSCSI Configuration Rules ..........2–1 General .
Page 5 Table of Contents Maintenance Terminal Connector ........3–6 Blower Fault LEDs .
Page 6 Table of Contents Error Reporting............5–5 Incompatible I/O Modules .
Page 7 Table of Contents Guidelines for Replacing a Disk Drive SBB ........7–6 The SBB Connector.
Page 8 Table of Contents Loading the Microcode........... C–4 Restarting the Controller .
Page 9 List of Figures Figure 1–1 DS–BA370 Series UltraSCSI Enclosure ......1–1 Figure 1–2 Typical DS–BA370 Applications .
Page 10 List of Figures Figure 4–7 Expansion Enclosure Address 3: Shelf and SCSI Bus IDs ....4–10 Figure 5–1 Single-Ended I/O Module ........5–1 Figure 5–2 I/O Module Location .
Page 11 Table 1–1 UltraSCSI Subsystems Capacities........1–7 Table 2–1 Compaq-Supported PVA SCSI ID Switch Settings ..... . 2–5 Table 2–2 Turning On the Subsystem Power .
Page 12 List of Tables Table 5–2 UltraSCSI Bus Expansion Rules ........5–8 Table 5–3 Preliminary Cabling Procedures .
Page 13: Preface
Preface The Compaq 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...
Page 14: Glossary
Preface Chapter 4 This chapter describes the power verification and addressing (PVA) assembly operation, functions, uses, configuration, and replacement procedures. Chapter 5 This chapter describes the single-ended input/output (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.
Page 15 Preface Documentation Conventions Table 1 describes the conventions for this publication: Table 1 Documentation Conventions Boldface type indicates the first instance of terms being defined in the text, the glossary, or both. Hypertext links connect each glossary term within boldface type a chapter to its definition in the glossary.
Page 16 Preface Table 1 Documentation Conventions (Continued) Notes contain information that might be of special Note interest to the user. Single-ended SCSI bus. Differential SCSI bus. Related Documents Table 2 lists publications that contain additional information about the UltraSCSI RAID subsystem: Table 2 Related Publications Publication Title Order Number...
Page 17 Preface Table 2 Related Publications (Continued) Publication Title Order Number Operating System Specific Release Notes See system-specific “Getting Started” manual Improving UltraSCSI RAID Subsystem EK–BA370–UP Operation Installing an External Cache Battery Cable EK–HSZ70–TE Installing a Host Bus Cable Ferrite Bead EK–SWXES–IG StorageWorks Solutions SBB User’s Guide EK–SBB35–UG...
Page 19: Manufacturer's Declarations
Manufacturer’s Declarations This section discusses electromagnetic compatibility and accoustic noise declarations. Electromagnetic Compatibility This CE–Mark Class A certified product can be installed 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 20 Manufacturer’s Declarations Acoustic Noise Declarations Compaq® declares that the acoustic values of this product are as shown in Table 1 and Table 2. Table 1 Acoustics – Declared Values per ISO 9296 and ISO 7779 Sound Pressure Sound Power Level...
Page 21 8 — 180 W shelf power supplies (DS–BA35X–HH) 24 — disk drives (2, 4, 9, or 18 GB) Note Aktuelle Werter für spezielle Austüstungsstufen sind über die Compaq Computer Vertretungen erhältlich. 1 Bel = 10 dBA. UltraSCSI RAID Enclosure xxi...
Page 23: Chapter 1, Introducing The Ultrascsi Raid Enclosure
Introducing the UltraSCSI RAID Enclosure The Compaq StorageWorks™ UltraSCSI RAID (redundant array of independent disks) enclosure (DS–BA370 series) shown in Figure 1–1 is the basic building block for Compaq single-ended UltraSCSI RAID subsystems. Figure 1–1 DS–BA370 Series UltraSCSI Enclosure CXO5797A...
Page 24 4. The enclosure and the subsystem are configured for UltraSCSI operation. Note The “DS–” model number prefix defines new Compaq storage products. In some cases, these numbers might be similar to an existing product number. For example, the DS–BA35X–HE ac input box (also known as the ac power controller) and the BA35X–HE ac input box have...
Page 25: Figure 1-2 Typical Ds-Ba370 Applications
Introducing the UltraSCSI RAID Enclosure Figure 1–2 Typical DS–BA370 Applications CXO6264A UltraSCSI RAID Enclosure 1–3...
Page 26: An Ultrascsi Bus Overview
Introducing the UltraSCSI RAID Enclosure An UltraSCSI Bus Overview UltraSCSI was developed by Digital Equipment Corporation (now Compaq Computer Corporation) and subsequently standardized by the ANSI (American National Standards Institute) SCSI (small computer system interface) committee as standard X3T10. UltraSCSI is a technology that incorporates several improvements over a Fast 10 SCSI bus.
Page 27: Product Description
Introducing the UltraSCSI RAID Enclosure Product Description The UltraSCSI enclosure is a rack-mountable storage subsystem that accommodates the following components: • Depending upon the configuration, a minimum of zero, or a maximum of two, UltraSCSI controllers with cache modules such as the DS–HSZ70 series. •...
Page 28: Figure 1-3 Typical Enclosure Bus And Device Addressing
Introducing the UltraSCSI RAID Enclosure Expansion enclosures have filler panels installed in the controller and cache module slots that improve air flow and reduce electromagnetic interference (EMI) radiation. The blank panels in the controller B and cache module B locations improve air flow and control EMI in enclosures with only one controller.
Page 29: Ultrascsi Raid Subsystem
Introducing the UltraSCSI RAID Enclosure • • • UltraSCSI bus array controllers and cache modules • Disk drives • I/O modules UltraSCSI RAID Subsystem A subsystem is one or more departmental server cabinets or data center cabinets with an enclosure. Each subsystem requires a master enclosure with an UltraSCSI controller installed.
Page 30: Pva
Introducing the UltraSCSI RAID Enclosure Each PVA functions only with its host enclosure and EMU. There is no master PVA in the UltraSCSI RAID subsystem. The PVA has the following primary functions: • Allows the user to select the enclosure UltraSCSI bus ID. •...
Page 31: Expansion Emu
Introducing the UltraSCSI RAID Enclosure 2 — Establishing SCSI bus device addresses 8, 9, 10, and 11 3 — Establishing SCSI bus device addresses 12, 13, 14, and 15 Note Not all array controllers support an UltraSCSI RAID subsystem with more than one enclosure. Refer to the array controller documentation to ensure that the controller supports expanded configurations.
Page 32: Cache Module
Introducing the UltraSCSI RAID Enclosure Note DS–HSx70 series array controllers require DS–HSx70 series cache modules to operate properly; likewise, DS–HSx80 series array controllers require DS–HSx80 series cache modules. Cache Module A storage buffer that is required to support bus controller operations.
Page 33: Options
Introducing the UltraSCSI RAID Enclosure Figure 1–4 DS–BA370 Status Figure 1–5 RA7000 Status LEDs Locations LEDs Locations System OK (green) Fault (amber) System OK (Green) Fault (Amber) CXO5451B CXO5751A For Both Figures ALLOUTS System OK (green) Fault (amber) Options The following sections describe the UltraSCSI RAID subsystem user selectable options.
Page 34: Redundant Power Supply Configuration
Introducing the UltraSCSI RAID Enclosure Redundant Power Supply Configuration Adding three power supplies and a second ac input box provides significantly more power redundancy than the standard configuration. The redundant power supply configuration uses a single ac power source. A system power failure will occur for any of the following conditions: •...
Page 35: Dual Controllers
Introducing the UltraSCSI RAID Enclosure Compaq recommends using this configuration to eliminate all single points of power failure. Dual Controllers Establishing a subsystem with a dual redundant configuration (two UltraSCSI controllers, two cache modules, and ECBs) is the most effective and efficient method of ensuring continuous subsystem operation in the event of a component failure.
Page 37: Chapter 2, 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 38: Ultrascsi Raid Controllers
Operating the UltraSCSI Enclosure • The following devices use a SCSI bus address (ID) and are SCSI bus nodes: — Adapters — Controllers — Storage devices • Every node on a bus must have a unique SCSI bus ID. • The SCSI bus ID for controller A is always 7.
Page 39: Ultrascsi Nodes
Operating the UltraSCSI Enclosure • Compaq UltraSCSI array controllers support FAST 10 (20 MB/s) 16-bit (wide) disk drives. • Compaq UltraSCSI array controllers support FAST 20 (40 MB/s) 16-bit (wide) disk drives. Caution If a conflict in controller configuration information exists...
Page 40: Ultrascsi Enclosures
Operating the UltraSCSI Enclosure UltraSCSI Enclosures The following configuration rules apply to UltraSCSI RAID subsystem enclosures: • The only compatible ac input box is model DS–BA35X–HE. • The only compatible power supply is model DS–BA35X–HH (180 W). The bezel label shown in Figure 2–1 identifies these power supplies.
Page 41: Starting The Subsystem
Operating the UltraSCSI Enclosure See Table 2–1 for the Compaq-supported PVA SCSI ID switch settings. Table 2–1 Compaq-Supported PVA SCSI ID Switch Settings Total Number Master First Second of Enclosures Enclosure Expansion Expansion None None None Starting the Subsystem After assembling an enclosure and connecting enclosure cabling, power is applied to start the subsystem.
Page 42: Applying Power
Operating the UltraSCSI Enclosure Applying Power Initial power application is a matter of turning on the ac input boxes located in the lower left and right corners of the enclosure (see Figure 2–2, labels A and B). Pressing the I on the ac power switch applies ac power only to the shelf power supplies on the associated power bus (bus A or B).
Page 43: Turning On The Subsystem
Operating the UltraSCSI Enclosure Turning On the Subsystem After completing subsystem assembly, expansion, or movement of the subsystem, complete the procedure in Table 2–2 to turn it back Table 2–2 Turning On the Subsystem Power If there are no expansion enclosures, go to step 2. If there are expansion enclosures, turn O all the ac...
Page 44: Shutting Down The Subsystem
Operating the UltraSCSI Enclosure Shutting Down the Subsystem Shutting down the subsystem involves: • Clearing the cache module • Shutting down the controller • Either turning O the dc power for the subsystem (entering the standby power mode) or going one step further and turning O the ac input boxes (full power shutdown) Caution Failure to clear the cache module and shut down the array...
Page 45: Using Standby Power Mode
Operating the UltraSCSI Enclosure Using Standby Power Mode Complete the procedure in Table 2–3 to turn O the dc power distribution, placing the subsystem in standby power mode. Complete the procedure in Table 2–4 to restore dc power within the enclosures. Table 2–3 Turning Off the DC Power Clear the cache module and shut down the array controller per the...
Page 46: Turning Off The Subsystem
Operating the UltraSCSI Enclosure Table 2–4 Restoring the DC Power If there are no expansion enclosures, go to step 3. If there are expansion enclosures, momentarily press the EMU alarm control switch (C 1) on each expansion enclosure. ALLOUT CXO6302A Momentarily press the EMU alarm control switch (C 1) on ALLOUT...
Page 47: Table 2-5 Turning Off The Subsystem Power
Operating the UltraSCSI Enclosure Table 2–5 Turning Off the Subsystem Power Clear the cache module and shut down the array controller per the array controller documentation. If there are no expansion enclosures, go to step 3. If there are expansion enclosures, press and hold the PVA standby power switch (C 1) on an expansion enclosure until the ALLOUT...
Page 48: Fault Detection
Operating the UltraSCSI Enclosure Fault Detection Fault detection involves identifying errors and providing an indication to the user for analysis. The following sections address how faults are identified, descriptions of status LED indications, and in some cases, possible corrective actions. Error Detection, Reporting, and Analysis The EMU and PVA constantly monitor the operational status of the enclosure and its components.
Page 49: Enclosure Status Indicators
Operating the UltraSCSI Enclosure Table 2–6 Enclosure Status Monitoring (Continued) Blowers • Operation • Operating speed • Installation For a detailed description of status LEDs, and specific error conditions, see the applicable chapter for each component. Enclosure Status Indicators The primary elements of the enclosure status indicators are the enclosure power supplies and blowers.
Page 50: Figure 2–3 Ds–Ba370 Status Leds Locations
Operating the UltraSCSI Enclosure Figure 2–3 DS–BA370 Status Figure 2–4 RA7000 Status LEDs Locations LEDs Locations CXO5451C CXO5751B For Figures ALLOUTS System OK LED System fault LED 1 is the system OK LED and is green. Callout 2 is the ALLOUT system fault LED and is amber.
Page 51: Table 2-7 Enclosure Status Led Displays
Operating the UltraSCSI Enclosure Table 2–7 Enclosure Status LED Displays Enclosure Type Description and Data Dept. Possible Corrective Actions Center Server Cabinet Cabinet The enclosure is operating normally. There are no detected errors. LED is O There are one or more failed components: LED is O Observe the EMU front panel to see if there is an overtemperature condition,...
Page 52: Sbb Shelf Status Indicators
Operating the UltraSCSI Enclosure SBB Shelf Status Indicators SBB shelf status indicators are provided by shelf power supplies and disk drive SBBs. Power Supply Status LEDs 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 Figure 2–5 Power Supply Status LEDs Figure C...
Page 53: Disk Drive Status Leds
Operating the UltraSCSI Enclosure Removal of a disk drive SBB device is automatically sensed by the array controller. When installing a replacement device in a configured subsystem, the array controller ensures that the replacement device type is identical to the one removed. Only after establishing complete compatibility can the array controller start configuring the disk drive SBB.
Page 54: Controller Shelf Status Indicators
Operating the UltraSCSI Enclosure Controller Shelf Status Indicators Controller shelf status indicators are provided by the array controllers, EMU, PVA, and I/O modules. Typical Controller Status LEDs The operator control panel (OCP) status LEDs (see Figure 2–7) display the controller status. For a detailed explanation of each status code, refer to the controller documentation.
Page 55: Emu Status Leds
Operating the UltraSCSI Enclosure EMU Status LEDs The EMU status LEDs (see Figure 2–8) have multiple functions (see Chapter 3). Figure 2–8 EMU Status LED Locations Figure C ALLOUTS System fault LED (amber) Temperature fault LED (amber) Power status LED (green) CXO6302A Blower fault, error...
Page 56: I/O Module Leds
Operating the UltraSCSI Enclosure I/O Module LEDs Each I/O module (see Figure 2–10) has two green status LEDs that display the status of both the internal (C 2) and external ALLOUT 1) SCSI bus terminator power (TERMPOWER). ALLOUT Whenever TERMPOWER is present, the applicable LED (internal or external) is O .
Page 57: Chapter 3, Environmental Monitoring Unit
Environmental Monitoring Unit 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 exchange and process some of this information. Figure 3–1 EMU CXO-5497A-MC Caution...
Page 58: Product Description
Environmental Monitoring Unit Product Description The EMU detects enclosure error conditions and configuration faults, and then notifies the user of existing or impending failures, using one or more of the following error reporting systems: • EMU LEDs • EMU audible alarm •...
Page 59: Controller Status
Environmental Monitoring Unit Caution Some array controllers bypass the standby power mode functionality from the PVA standby power switch. Refer to the array controller documentation for availability of this feature. Note An overtemperature condition (greater than 50°C) causes the EMU to turn the enclosure dc power O .
Page 60: I/O Module Status
Environmental Monitoring Unit I/O Module Status The EMU verifies 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 one of these conditions are not met. The EMU also reports the I/O module type to the array controller.
Page 61: Emu Front Panel
Environmental Monitoring Unit EMU Front Panel The EMU user interface controls, connectors, and LED displays are on the front panel (see Figure 3–3). The following sections describe the function of each component. Figure 3–3 EMU Major Component Locations Figure C ALLOUTS EMU communications connector (labeled IIC)
Page 62: Temperature Fault Led
Environmental Monitoring Unit Temperature Fault LED If either the intake or exhaust air temperature exceeds user-defined temperature setpoints, this amber LED (C 3) turns O . The ALLOUT LED remains O until the overtemperature condition is corrected. Power Status LED This green power status LED (C 4) turns O if all the...
Page 63: Configuring The Emu
EMU can monitor and control all the enclosures within the UltraSCSI subsystem. Figure 3–4 EMU Communications Bus Connections CXO5820A Compaq recommends using a BN26M cable (see Table 3–1) no longer than 4 m (13.1 ft) to connect the EMUs. UltraSCSI RAID Enclosure 3–7...
Page 64: Emu Firmware
(91°F). Operating the blowers in high-speed should prevent an overtemperature condition from occurring and should prevent shutting down the enclosure. Compaq recommends using predetermined set points for EMU firmware versions 1.0, 1.1, and 1.2, as identified in the following sections.
Page 65: Emu Firmware Versions 1.0 And 1.1
Environmental Monitoring Unit Caution For EMU firmware versions 1.0 and 1.1, the command set emu sensor_n_setpoint=default cannot be used. This command establishes a temperature set point that is too low for proper operation and might result in an erroneous subsystem alarm. Removing and replacing the master EMU automatically changes the temperature set points.
Page 66: Installing Emu Firmware Updates
• Sensors 1 and 2 — 47 • Sensor 3 — 37 Installing EMU Firmware Updates EMU firmware updates are installed by Compaq field service personnel. Appendix C provides general microcode installation procedures. Setting the Temperature Sensors Three temperature sensors are found in each UltraSCSI RAID enclosure: •...
Page 67: Table 3-2 Emu Set Point Temperature Conversions
Environmental Monitoring Unit Note For detailed instructions about using the set emu commands, refer to the array controller CLI documentation. Table 3–2 EMU Set Point Temperature Conversions °F °C °F °C °F °C °F °C °F °C Table 3–3 Temperature Set Point Rules—EMU Firmware Versions 1.0 and 1.1 Enter all temperatures in degrees Celsius (°C).
Page 68: Setting The Blower Speed Control
Environmental Monitoring Unit Table 3–3 Temperature Set Point Rules—EMU Firmware Versions 1.0 and 1.1 (Continued) EMU firmware versions 1.0 or 1.1 cannot use the set emu sensor_ n _setpoint=default command. Instead, the following command is required: set emu sensor_ n _setpoint= nn (where nn is the desired temperature in °C).
Page 69 The EMU intake air temperature exceeds the user-defined temperature setting. • The backplane exhaust air temperature exceeds the user-defined temperature setting. Compaq suggests using the set emu fanspeed=high command for either of the following conditions: • EMU intake air temperature is more than 38°C (100°F). •...
Page 70: Emu Status Reporting
Environmental Monitoring Unit • Starts the EMU timer if: (1) all blowers in a shelf bank are defective, or (2) a blower is removed. • Approximately eight minutes after the EMU timer begins operating, the array controllers will shut down and then the EMU turns O the dc power in the enclosure to prevent continued overheating and potential equipment damage.
Page 71: Alarm Control Switch
Environmental Monitoring Unit • Fault conditions—involves a subsystem configuration problem, such as a Boot ROM checksum failure. If a fault condition is detected, the system fault LED 1) starts F . For detailed information about ALLOUT LASHING other system fault LED indications, see the Configuration Fault Code Reporting section within this chapter.
Page 72: Emu Status Leds
Environmental Monitoring Unit • The error condition still exists after 1 hour has passed. This situation causes the audible alarm to continue sounding once every hour for approximately 5 seconds. To clear all the fault code displays, press and hold the alarm control switch for at least 5 seconds.
Page 73: Monitoring Power Supply Operations
Environmental Monitoring Unit Monitoring Power Supply Operations Even with four operational power supplies, it is possible that a power supply problem might cause one or both of the dc voltages to be too low. Both the PVA and EMU monitor power supply operations to ensure that dc voltages are within a specified range (see Table 3–6).
Page 74: Error Condition Reporting
Environmental Monitoring Unit Error Condition Reporting EMU status LEDs identify system (enclosure) status, power status, temperature status, blowers status, and error conditions. During normal operations, only the power LED is O . Refer to Figure 3–5 as necessary to recall EMU status LED names and locations. Figures contained in Table 3–7 describe: •...
Page 75 Environmental Monitoring Unit Table 3–7 EMU Status Displays (Continued) Nonoperational Enclosure CXO5780A Probable Cause 1—Either +5 V dc or 12 V dc out of range. Observe the individual power supply status LEDs to determine the defective power supply and replace it. Probable Cause 2—TERMPOWER less than +4.5 V dc on one or more I/O modules.
Page 76 Environmental Monitoring Unit Table 3–7 EMU Status Displays (Continued) Configuration Error (Example 1) CXO5783A Probable Cause 1—Configuration error. See the Configuration Fault Code Reporting section for the specific error condition. Probable Cause 2—Slave EMU cannot communicate with the master EMU. See the Configuration Fault Code Reporting section for the specific error condition.
Page 77: Configuration Fault Code Reporting
Environmental Monitoring Unit Table 3–7 EMU Status Displays (Continued) 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 to prevent an overtemperature condition from inducing a subsystem RESET or failure.
Page 78: Table 3-8 Emu Fault Code Displays
Environmental Monitoring Unit Each time the alarm control switch is momentarily pressed, the EMU initiates the following sequence of actions: 1. The blower LEDs display the first reported hexadecimal fault code three times in succession. — The LEDs display the first reported fault code (for the first time) for 1 second and then turn O —...
Page 79 Environmental Monitoring Unit Table 3–8 EMU Fault Code Displays (Continued) Fault Code, Cause, Corrective EMU LED Display Action Fault Code 02 Both microcode images are bad. Load microcode image into the EMU from a PC. Replace the EMU. CXO5761A Fault Code 03 Either a PVA SCSI ID switch setting is invalid (set to 1, 4, 5, 6, or 7) or there is no master enclosure identified (SCSI...
Page 80 Environmental Monitoring Unit Table 3–8 EMU Fault Code Displays (Continued) Fault Code, Cause, Corrective EMU LED Display Action Fault Code 04 Master EMU cannot communicate with expansion EMU. CXO5763A Ensure PVA SCSI ID switches settings are as follows: • Master enclosure — 0 •...
Page 81 Environmental Monitoring Unit Table 3–8 EMU Fault Code Displays (Continued) Fault Code, Cause, Corrective EMU LED Display Action Fault Code 07 Invalid configuration. Requires an array controller-specific action (see the array controller documentation). CXO5766A Fault Code 08 Two PVA SCSI ID switch settings are the same.
Page 82 Environmental Monitoring Unit Table 3–8 EMU Fault Code Displays (Continued) Fault Code, Cause, Corrective EMU LED Display Action Fault Code 0A No PVA is installed. Install a PVA. CXO5769A Fault Code 0B Controller fault. Requires an array controller-specific action (see the array controller documentation).
Page 83 Environmental Monitoring Unit Table 3–8 EMU Fault Code Displays (Continued) Fault Code, Cause, Corrective EMU LED Display Action Fault Code 0E EMU memory test failed. Replace the EMU. CXO5773A Fault Code 0F Initial Display Less than four operational power supplies remain. Replace the defective power supplies.
Page 84: Replacing An Emu
Environmental Monitoring Unit Replacing an EMU Complete the procedure in Table 3–9 to remove an EMU and complete the procedure in Table 3–10 to install an EMU. Table 3–9 Removing an EMU Clear the cache module and shut down the array controller per the array controller documentation.
Page 85: Table 3-10 Installing An Emu
Environmental Monitoring Unit Table 3–9 Removing an EMU (Continued) Pull the EMU extractor latches outward and remove the EMU. CXO-5497A-MC Table 3–10 Installing an EMU Verify that the EMU is a model DS–BA35X–EB. CXO-5497A-MC Align the EMU in the top, left-hand slot 1) and insert ALLOUT CXO5754B...
Page 86 Environmental Monitoring Unit Table 3–10 Installing an EMU (Continued) Pull the EMU extractor latches outward. Push the EMU into the slot until the extractor latches engage the enclosure, then push the extractor latches inward to seat and secure the EMU. If there are no expansion enclosures, go to step 6.
Page 87: Chapter 4, Power Verification And Addressing
Power Verification and Addressing An enclosure’s PVA assembly (see Figure 4–1) and associated EMU monitors the status of major UltraSCSI enclosure components to verify their proper operation. If an error or fault condition occurs, these modules notify the user, and in some instances, the array controller, that a problem exists.
Page 88: Product Description
Power Verification and Addressing The PVA and EMU mount next to each other in the enclosure—the EMU (C 1) is on the left and the PVA is on the right ALLOUT 2) as shown in Figure 4–2. ALLOUT Figure 4–2 PVA Location Figure C ALLOUTS CXO5754B...
Page 89: Functions
Monitors the enclosure EMU status and notifies the user when the EMU is missing. • Allows the user to select a Compaq-supported device SCSI bus address (device ID) for each enclosure. • Ensures at least four operational power supplies are in the enclosure.
Page 90: Pva Operation
Power Verification and Addressing This action—removing power from the enclosure—duplicates an EMU function and ensures optimum subsystem performance and integrity. PVA Operation Most PVA operations occur automatically and do not require user intervention. The following sections define major PVA operations. EMU Installation Monitoring If the EMU is removed or installed incorrectly (for example, not fully seated), the PVA detects this condition and sounds the PVA audible...
Page 91: Figure 4-4 Master Enclosure Device Ids
This switch has eight (0 through 7) positions. Caution To preclude SCSI bus addressing conflicts, Compaq only supports PVA SCSI ID switch settings of 0, 2, and 3. Always set the master enclosure PVA SCSI ID switch setting to 0.
Page 92: Monitoring Power Supply Operations
Power Verification and Addressing Monitoring Power Supply Operations Even with four operational power supplies, it is possible that a power supply problem might 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 4–1.
Page 93: Setting The Enclosure Address
There is only one master enclosure in any subsystem. • No two enclosures in a subsystem are allowed to have the same address. See Table 4–3 for the Compaq-supported enclosure addresses. Caution All devices on the same SCSI bus must have a unique SCSI bus ID.
Page 94: Master Enclosure Address
Power Verification and Addressing Table 4–3 Compaq-Supported PVA SCSI ID Switch Settings Total Number Master First Second of Enclosures Enclosure Expansion Expansion None None None Master Enclosure Address The master enclosure PVA SCSI ID switch setting is always 0. This setting establishes the disk drive SBB SCSI bus IDs shown in Figure 4–5.
Page 95: Expansion Enclosure Addresses
Power Verification and Addressing Expansion Enclosure Addresses Compaq supports only PVA SCSI ID switch settings of 2 (see Figure 4–6) and 3 (see Figure 4–7) for expansion enclosures: • 2 — Used for the first expansion enclosure. • 3 — Used for a second expansion enclosure.
Page 96: Implementing The Standby Power Mode
Power Verification and Addressing Figure 4–7 Expansion Enclosure Address 3: Shelf and SCSI Bus IDs Figure C ALLOUT SCSI bus CXO-4843A-MC CXO5777B Implementing the Standby Power Mode A major function of the PVA is implementing the standby power mode. This mode removes dc power from all enclosure components, except for the EMU alarm control switch.
Page 97: Table 4-4 Turning Off The Dc Power Distribution
Power Verification and Addressing Table 4–4 Turning Off the DC Power Distribution Clear the cache module and shut down the array controller per the array controller documentation. If there are no expansion enclosures, go to step 3. If there are expansion enclosures, press and hold the PVA standby power switch (C 1) on an expansion enclosure until the ALLOUT...
Page 98: Replacing A Pva
Power Verification and Addressing Table 4–5 Turning On the DC Power Distribution If there are no expansion enclosures, go to step 3. If there are expansion enclosures, momentarily press the EMU alarm control switch (C 1) on each expansion enclosure. ALLOUT CXO6302A Momentarily press the EMU alarm control switch (C...
Page 99 Power Verification and Addressing Table 4–6 Removing a PVA (Continued) If there are no expansion enclosures, go to step 3. If there are expansion enclosures, press and hold the PVA standby power switch (C 1) on an expansion enclosure until the ALLOUT master EMU initiates a power shut down on all enclosures.
Page 100: Table 4-7 Installing A Pva
Power Verification and Addressing Table 4–6 Removing a PVA (Continued) Note the enclosure address setting (0, 2, or 3) on the PVA SCSI ID switch (C ALLOUT CXO5821A Pull both extractor latches outward and remove the PVA. Table 4–7 Installing a PVA Verify that the PVA being installed is a model DS–BA35X–EC.
Page 101 Power Verification and Addressing Table 4–7 Installing a PVA (Continued) Pull the PVA extractor latches outward. Push the PVA into the slot until the extractor latches engage the enclosure, then push the extractor latches inward to seat and secure the PVA. Ensure that the PVA SCSI ID switch is set to the valid number for the enclosure: •...
Page 103: Chapter 5, Single-Ended I/O Module
Single-Ended I/O Module The single-ended I/O module (see Figure 5–1) performs two functions: • Provides termination for both the internal and external SCSI buses • Establishes SCSI bus communications between enclosures Figure 5–1 Single-Ended I/O Module CXO5816A Caution I/O modules provide termination for both the internal and external SCSI buses.
Page 104: Figure 5-2 I/O Module Location
Single-Ended I/O Module Note Not all array controller firmware supports an UltraSCSI RAID subsystem with more than one enclosure. Refer to the array controller documentation to ensure that the controller supports expanded configurations. Six I/O modules mount on the bottom rear (see Figure 5–2, 1) of each enclosure.
Page 105: I/O Module And Expansion Cable Error Conditions
SCSI buses between enclosures. These connectors are wired in parallel and act as a trilink connector. In an expansion configuration, Compaq recommends a maximum cable length of 2 m (6.6 ft) between enclosures. UltraSCSI RAID Enclosure 5–3...
Page 106: Controlling The Internal Scsi Bus
Single-Ended I/O Module 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 107: Controlling The Fault Bus
Single-Ended I/O Module Controlling the Fault Bus The I/O module controls fault bus operation in the following manner: • Provides a fault bus driver for improved signal transmission • Distributes the FAULT_CLK and FAULT_DATA signals from the master enclosure to the expansion enclosures •...
Page 108: Termpower Errors
Single-Ended I/O Module Only when all I/O modules are the same type can an UltraSCSI RAID subsystem function properly. The Compaq UltraSCSI controller only supports single-ended buses. Therefore, use only single-ended I/O modules (DS–BA35X–MN). The enclosure does not support the following conditions: •...
Page 109: Rules For Expanding An Ultrascsi Bus
SCSI bus IDs. Note Wide UltraSCSI supports a maximum of 16 devices per bus (2 array controllers and 14 disk drives). However, Compaq does not support any configuration with more than 12 disk drives. To expand a SCSI bus, use the 68-pin VHDCI receptacle connectors on the I/O module and a BN37A series cable.
Page 110: Table 5-2 Ultrascsi Bus Expansion Rules
Single-Ended I/O Module Caution The Compaq UltraSCSI controller does not support connecting or disconnecting a SCSI bus cable when both data and power are present on the connector—a “hot swap.” Only connect or disconnect SCSI bus cables using the “cold swap” method.
Page 111: Cabling An Ultrascsi Subsystem
Refer to the array controller documentation to ensure the controller supports expanded configurations. The Compaq UltraSCSI controller does not support connecting or disconnecting a SCSI bus cable when both data and power are present on the connector—a hot swap.
Page 112: Shutting Down The Subsystem
Single-Ended I/O Module Table 5–4 UltraSCSI Bus Cables Length Order Description Number Meters Feet 68-conductor SCSI cable with: BN37A–0C — BN37A–0E VHDCI straight plug BN37A–01 connectors with jack screws BN37A–1E BN37A–02 CXO5702A Shutting Down the Subsystem To protect the data and devices, complete the procedures in Table 5–3 and Table 5–5 before beginning cable installation procedures for a two- or three-enclosure subsystem.
Page 113: Table 5-5 Shutting Down The Ultrascsi Subsystem
Single-Ended I/O Module Table 5–5 Shutting Down the UltraSCSI Subsystem Clear the cache module and shut down the array controller per the array controller documentation. If there are no expansion enclosures, go to step 3. If there are expansion enclosures, press and hold the PVA standby power switch (C 1) on an expansion enclosure until the ALLOUT...
Page 114: Cabling A Two-Enclosure Subsystem
Single-Ended I/O Module Cabling a Two-Enclosure Subsystem Complete the procedures in Table 5–6 to connect the master enclosure to one expansion enclosure. Perform this procedure for the I/O modules on each SCSI bus, starting with SCSI bus 1 in Figure 5–3. Each SCSI bus requires one BN37A cable for a total of six cables.
Page 115 Single-Ended I/O Module Table 5–6 Installing Two-Enclosure Subsystem Cables (Continued) On the master enclosure I/O module, align the Cable A (C ALLOUT connector with the left connector. Gently insert the cable connector into the module connector. Tighten both cable connector thumb screws to fully seat the CXO5854B connector.
Page 116 Single-Ended I/O Module Table 5–6 Installing Two-Enclosure Subsystem Cables (Continued) 10. On the expansion enclosure shroud, align the module that has Cable A (C A) attached with the Port 1 backplane connector. ALLOUT Gently insert the module and fully seat it. Use a screwdriver to tighten the spring-loaded mounting screws.
Page 117: Turning On The Subsystem
Single-Ended I/O Module Turning On the Subsystem Complete the procedures in Table 5–7 to turn O the subsystem. Table 5–7 Turning On the UltraSCSI Subsystem If there are no expansion enclosures, go to step 3. Turn O all the ac input boxes for each expansion enclosure by pressing I on each ac power switch...
Page 118: Cabling A Three-Enclosure Subsystem
Single-Ended I/O Module Cabling a Three-Enclosure Subsystem Complete the procedures in Table 5–8 to connect the master enclosure to two expansion enclosures. The second expansion enclosure connects to either the master enclosure or the first expansion enclosure. Table 5–8 connects the second expansion enclosure to the first expansion enclosure.
Page 119: Table 5-8 Installing Three-Enclosure Subsystem Cables
Single-Ended I/O Module Table 5–8 Installing Three-Enclosure Subsystem Cables Complete Table 5–5 to shut down the UltraSCSI subsystem. Use a screwdriver to loosen the two spring-loaded mounting screws on the I/O module. Grasp the I/O module by the cable support bracket and pull it straight outward until removed from the enclosure...
Page 120 Single-Ended I/O Module Table 5–8 Installing Three-Enclosure Subsystem Cables (Continued) On the master enclosure shroud, align the module that has Cable A A) attached with the Port 1 backplane connector. Gently ALLOUT insert the module and fully seat it. Use a screwdriver to tighten the spring-loaded mounting screws.
Page 121 Single-Ended I/O Module Table 5–8 Installing Three-Enclosure Subsystem Cables (Continued) 11. Install a wire tie through the holes on the cable support bracket and around the cable. Tighten the wire tie. 12. On the first expansion enclosure shroud, align the module that has Cable B (C B) attached with the Port 1 backplane connector.
Page 122 Single-Ended I/O Module Table 5–8 Installing Three-Enclosure Subsystem Cables (Continued) 15. On the second expansion enclosure shroud, align the module that has Cable B (C B) attached with the Port 1 backplane connector. ALLOUT Gently insert the module and fully seat it. Use a screwdriver to tighten the spring-loaded mounting screws.
Page 123: Replacing An I/O Module
Single-Ended I/O Module Replacing an I/O Module Complete the procedure in Table 5–9 to remove an I/O module. Complete the procedure in Table 5–10 to install an I/O module. Caution To prevent interrupting a data transfer or losing data, shut down the subsystem before removing an I/O module.
Page 124: Table 5-10 Installing An I/O Module
Single-Ended I/O Module Table 5–10 Installing an I/O Module Verify that the I/O module being installing is a model DS–BA35X–MN. CXO5816A Note Jumpers are factory installed—do not modify jumper settings. Align the cable with the left I/O module connector. Gently insert the cable connector into the module connector.
Page 125: Replacing An Expansion Cable
Single-Ended I/O Module Replacing an Expansion Cable Complete the procedure in Table 5–11 to remove an expansion cable. Complete the procedure in Table 5–12 to install an expansion cable. Caution Not all array controllers support an UltraSCSI RAID subsystem with more than one enclosure. Refer to the array controller documentation to ensure that the controller supports expanded configurations.
Page 126: Table 5-12 Installing An Expansion Cable
Single-Ended I/O Module Table 5–12 Installing an Expansion Cable Verify that the expansion cable is the proper type and length per Table 5–4. CXO5702A Align the cable with the left I/O module connector. Gently insert the cable connector into the module connector. Tighten both cable connector thumb screws to fully seat the...
Page 127: Chapter 6, Power Distribution
Power Distribution This chapter describes the UltraSCSI RAID enclosure power distribution to include the following: • Enclosure power system overview (see Figure 6–1) • Power distribution configurations (standard, redundant, and optimum) • Error condition reporting • Replacement procedures (power supply and ac input box) Figure 6–1 Enclosure Power System CXO5800A UltraSCSI RAID Enclosure 6–1...
Page 128: Power System Overview
Power Distribution Note Proper operation of the controller cache modules requires ECBs. Refer to the array controller documentation for discussion on how to use the ECBs. Power System Overview In any RAID subsystem, the elimination of single points of failure is taken into consideration.
Page 129: Standard (N+1)
Power Distribution Three configurations exist: • Standard (n+1) • Redundant (n+4) • Optimum (n+4) Standard (n+1) This configuration has one redundant power supply for a total of five power supplies. A single ac input box distributes ac power to all five power supplies using power bus A.
Page 130: Ac Input Box
Power Distribution AC Input Box The ac power distribution is provided through the ac input box (see Figure 6–2) to the shelf power supplies. The ac power switch on each ac input box controls the ac distribution to the associated power bus (A or B).
Page 131: Shelf Power Supplies
Power Distribution Shelf Power Supplies Each shelf power supply (see Figure 6–3) converts the incoming ac voltage into +5 V dc and +12 V dc and distributes these voltages throughout the RAID enclosure. The maximum capacity for the UltraSCSI RAID enclosure is eight power supplies, four of which provide power redundancy.
Page 132: Ac Power Buses
Cache B CXO6482B CXO6301B Although the standard (n+1) power configuration can operate the subsystem via power bus A (C 1), Compaq recommends ALLOUT using both power buses with two ac power sources—the optimum power configuration (n+4). Power bus A (C...
Page 133: Power Distribution Configurations
Power Distribution Power Distribution Configurations This section describes the three power configurations for the UltraSCSI RAID enclosure. Standard (n+1) Power Configuration This power configuration provides minimum power supply redundancy. AC power distribution is provided over power bus A to five power supplies located in positions 1A through 5A (see Figure 6–5).
Page 134: Redundant (N+4) Power Supply Configurations
Power Distribution Any one of the following power related error conditions will cause this UltraSCSI RAID enclosure to cease operation: • Loss of the ac power source • Failure of two shelf power supplies • Failure of the ac input box Redundant (n+4) Power Supply Configurations This power configuration provides more power redundancy than the...
Page 135: Optimum (N+4) Power Supply Configurations
To implement this configuration from n+1 or an n+4 configuration requires a second ac power source. Compaq recommends using this power configuration to eliminate all single points of power failure. The optimum power configuration provides complete data protection with maximum redundancy of all enclosure power system components and the ac input power source.
Page 136: Error Condition Reporting
Power Distribution • Failure of the ac power source for bus B and one power supply on bus A • Failure of the ac power source on bus A and one power supply on bus B • Failure of the ac input box on bus B and one power supply on bus A •...
Page 137: Ac Input Box
Power Distribution The green power supply status LED (C 2) is O when the ALLOUT power supply is operating properly. If the power supply fails, both power supply LEDs (C 1 and 2) turn O ALLOUTS Table 6–1 identifies the possible fault displays and provides a description of each state.
Page 138: Replacing A Power Supply
Power Distribution Replacing a Power Supply This section describes how to properly handle power supply SBBs and the procedures for replacing a power supply. Handling a Power Supply SBB Table 6–2 defines the proper methods for handling a power supply SBB to prevent damaging it.
Page 139: Procedures For Replacing A Power Supply
Power Distribution Procedures for Replacing a Power Supply The basic procedure for removing and replacing shelf power supplies is the same as for replacing disk drives. There are two methods for replacing shelf power supplies—the hot swap method and the cold swap method. Use the power supply status LED indication, either operational or nonoperational, to determine which swap method to use.
Page 140 Power Distribution Table 6–3 Removing a Power Supply (Continued) If there are no expansion enclosures, go to step 5. If there are expansion enclosures, press and hold the PVA standby power switch (C 1) on an expansion enclosure until the ALLOUT master EMU initiates a power shut down on all enclosures.
Page 141: Table 6-4 Installing A Power Supply
Power Distribution Table 6–3 Removing a Power Supply (Continued) Press the two mounting tabs together to release the power supply from the shelf. Using both hands, pull the power supply out of the shelf. CXO-4314A-MC 10. Place the power supply into an electrostatic bag. 11.
Page 142 Power Distribution Table 6–4 Installing a Power Supply (Continued) Insert the power supply into the guide slots and push it in until the bezel mounting tabs engage the shelf, fully seating the power supply. CXO-4314A-MC Connect the power cord to the power supply. For a cold swap method, go to step 6 to turn O the subsystem.
Page 143: Replacing An Ac Input Box
Power Distribution Replacing an AC Input Box Complete the procedure in Table 6–5 to remove an ac input box. Complete the procedure in Table 6–6 to install an ac input box. WARNING! Only qualified service personnel can replace an ac input box.
Page 144: Table 6-6 Installing An Ac Input Box
Power Distribution Table 6–5 Removing an AC Input Box (Continued) Disconnect the ac power cord (C 4) from the ac input box ALLOUT ALLOUT Loosen the two retaining screws (C 2) and remove the ac ALLOUT input box (C ALLOUT CXO5186B Place the ac input box into an electrostatic bag.
Page 145 Power Distribution Table 6–6 Installing an AC Input Box (Continued) Align the ac input box (C 1) with either slot A or slot B in the ALLOUT lower left or lower right corner of the RAID enclosure, respectively. CXO5186B Push in on the ac input box to fully seat it. Tighten the two retaining screws (C ALLOUT Connect the ac power cord (C...
Page 147: Chapter 7, Storage Devices
Figure 7–1 Typical Disk Drive SBB CXO-4562A-MC Caution The Compaq UltraSCSI RAID enclosure supports 3.5-inch disk drive SBBs. This enclosure does not support tape drives, solid state disks, optical disk drives, CD-ROMs, or 5.25-inch devices. For a list of supported devices, refer to the operating system-specific release notes.
Page 148: Identifying A Storage Device
Storage Devices Identifying a Storage Device To determine the model number of a storage device (disk drive SBB), look at the regulatory label (see Figure 7–2) on the side of the SBB or at the disk drive SBB bezel label. Figure 7–2 Typical Drive SBB Regulatory Label CXO5916A A typical drive SBB bezel label (see Figure 7–3) includes the...
Page 149: Disk Drive Sbb Device Addressing
Storage Devices Figure 7–3 Typical Drive SBB Bezel Label Figure C ALLOUTS DS-RZ1CB-VW 4.3 GB Device model number Device storage capacity LUN # User-assigned SCSI LUN ID # User-assigned SCSI identification number (target ID) CH # User-assigned array controller channel number—the array controller port or SCSI bus number SCSI bus device width: CXO5917A...
Page 150: Disk Drive Sbb Status Reporting
Storage Devices Disk Drive SBB Status Reporting The array controller monitors the status of the disk drive SBBs. If a fault occurs, the fault and the disk drive SBB device address (SCSI target ID) are reported to the array controller or host for processing. The disk drive status LEDs define the status of individual disk drive SBBs.
Page 151 Compaq recommends replacing this storage SBB. The disk drive SBB is active and in spin-down status because of a fault. Compaq recommends replacing the disk drive SBB after the device has spun down. Two conditions are possible: In response to a fault bus message, the array controller is spinning down the device.
Page 152: Guidelines For Replacing A Disk Drive Sbb
Conditions). Products or connectors damaged due to a higher number of replacement cycles are not eligible for return under warranty or standard service plans. Compaq markets a specific family of removable storage elements for higher replacement cycle environments. Contact your Compaq Account Representative for more information.
Page 153: Prerequisites For Replacing A Disk Drive Sbb
Before replacing a device, determine the appropriate replacement method based upon the capabilities of the array controller. Caution The methods for replacing Compaq array controllers and cache modules are device dependent. Refer to the array controller documentation or release notes for detailed instructions.
Page 154: Hot Swap
If you are not positive that your SCSI controller supports hot swap, Compaq recommends using warm swap to protect data integrity. Use hot swap to remove and replace disk drive SBBs from a system that is online and active.
Page 155: Replacing A Disk Drive Sbb
Storage Devices Replacing a Disk Drive SBB This section describes how to properly handle disk drive SBBs and the procedures for replacing a disk drive SBB. Handling a Disk Drive SBB Table 7–2 defines the proper methods for handling a disk drive SBB to prevent damage.
Page 156: Procedures For Replacing A Disk Drive Sbb
Storage Devices Procedures for Replacing a Disk Drive SBB Complete the procedure in Table 7–3 to remove a disk drive SBB. When initially installing disk drive SBBs in an enclosure or installing a single disk drive SBB, complete the procedure in Table 7–4. Table 7–3 Removing a Disk Drive SBB To perform a hot swap, go to step 8.
Page 157 Storage Devices Table 7–3 Removing a Disk Drive SBB (Continued) If there are no expansion enclosures, go to step 7. If there are expansion enclosures, turn O all the ac input boxes for each expansion enclosure by pressing O on each ac power switch (C ALLOUT Turn O...
Page 158: Table 7-4 Installing A Disk Drive Sbb
Storage Devices Table 7–4 Installing a Disk Drive SBB Verify that the disk drive SBB is the correct model and fill in bezel label information for this disk drive. CXO-4562A-MC If assembling an UltraSCSI enclosure, go to step 8. For a hot or warm swap, insert the disk drive SBB into the guide slot and push it in until the...
Page 159 Storage Devices Table 7–4 Installing a Disk Drive SBB (Continued) If performing a cold swap, determine if there are expansion enclosures. If there are no expansion enclosures, go to step 7. If there are expansion enclosures, turn O all the ac input boxes for each expansion enclosure by pressing O on each ac power...
Page 160 Storage Devices Table 7–4 Installing a Disk Drive SBB (Continued) 11. Starting at the left end, install all the disk drive SBB devices in shelf 4 (devices 19 through 24). 12. If performing a cold swap, determine if there are expansion enclosures.
Page 161: Chapter 8, 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 involves using air conditioning to establish and maintain the proper external, that is, ambient, environment. Failure to achieve these goals might cause components to malfunction and compromise data integrity.
Page 162: Figure 8-1 Enclosure Blower Assembly Locations
Enclosure Blowers Figure 8–1 Enclosure Blower Assembly Locations Figure C ALLOUTS Bank A A1. Blower 1 A2. Blower 2 A3. Blower 3 A4. Blower 4 Bank B B5. Blower 5 B6. Blower 6 B7. Blower 7 B8. Blower 8 CXO5494B Enclosure temperature sensors (see Chapter 3) detect overtemperature conditions or blower malfunctions and alert the user to the problem.
Page 163: Function And Operation
Enclosure Blowers • If a blower error condition is caused by only one defective blower per blower bank (see Figure 8–1), the EMU does not initiate a power shut down. Function and Operation Cooling enclosure components is accomplished by pulling air in through the front of each component, over the internal circuitry, through the backplane, and exhausting it out the rear of the enclosure.
Page 164: Error Condition Reporting
However, Compaq recommends replacing a defective blower immediately. If a blower is removed and not replaced within approximately 8 minutes, the array controllers will...
Page 165: Table 8-1 Removing A Blower
Enclosure Blowers Caution Operating an UltraSCSI enclosure with a blower removed significantly changes the air flow pattern and reduces air flow through the components. If a blower is removed and not replaced within approximately 8 minutes, the array controllers will shut down and then the EMU will turn O the dc power distribution.
Page 166: Table 8-2 Installing A Blower
Enclosure Blowers Table 8–2 Installing a Blower Verify that the blower is a model DS–BA35X–MK. Orient the replacement blower to align its connector (C ALLOUT and guide pin (C ALLOUT with the backplane blower connector. CXO5753B Push the blower straight in, until the upper and lower mounting tabs 3 and 4) snap into place.
Page 167: Appendix A, Ultrascsi Enclosure Specifications
UltraSCSI Enclosure Specifications This appendix defines the physical, electrical, and environmental specifications for a Compaq StorageWorks UltraSCSI enclosure with 24 disk drives and all its major electronic components. See Figure A–1 and its associated C numbers on the following page.
Page 168: Physical And Electrical Specifications
UltraSCSI Enclosure Specifications Note The operating and servicing physical specifications as well as the electrical specifications for the UltraSCSI RAID enclosure are cabinet- and configuration-specific. Physical and Electrical Specifications The following specifications apply to a single UltraSCSI RAID enclosure (see Figure A–2) with all of the components installed. Figure A–2 UltraSCSI Enclosure Shipping Dimensions Installed Dimensions...
Page 169: Operating Environments
UltraSCSI Enclosure Specifications Operating Environments Table A–1, Table A–2, and Table A–3 provide the environmental specifications for the controller shelf. Table A–1 Optimum Operating Environment Condition Specification Temperature 18–24°C (64–75°F) with an average rate of change of 3°C/h maximum and a step change of 3°C/h or less Relative humidity 40–60% (noncondensing) with a step change of 10% or less (noncondensing)
Page 170: Table A-3 Shipping Environment
UltraSCSI Enclosure Specifications Table A–3 Shipping Environment Condition Specification Temperature –40°C to +66°C (–40°F to +150°F) Relative humidity 10–80% noncondensing Altitude 4900 m (16,000 ft) A–4 UltraSCSI RAID Enclosure...
Page 171: Sbb Thermal Stabilization
UltraSCSI Enclosure Specifications SBB Thermal Stabilization For proper operation upon initial power application, maintain the Compaq SBB storage device temperature within the range of 18–29°C (65–85°F). See Table A–4 for condition statements. Caution Always thermally stabilize a disk drive SBB in the operating environment before installing or operating it.
Page 173: Figure B-1 Ultrascsi Raid Subsystem
Appendix B Assembling an UltraSCSI RAID Subsystem Assembling an UltraSCSI RAID subsystem (see Figure B–1) requires sequentially installing the components in a DS–BA370 series rack-mountable enclosure. The UltraSCSI RAID enclosure arrives as either a departmental server cabinet (a pedestal with a factory installed enclosure) or an empty enclosure that requires mounting within a data center cabinet (SW600 series).
Page 174: Appendix B, Assembling An Ultrascsi Raid Subsystem
Assembling an UltraSCSI RAID Subsystem 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 175: Installing The Emu
Assembling an UltraSCSI RAID Subsystem 1. Mount an empty UltraSCSI RAID enclosure in the data center cabinet using cabinet documentation. Departmental server cabinets arrive prepared for component installation. 2. Install the EMU and the EMU communication cables as required. 3. Install the PVA. 4.
Page 176: Installing The I/O Modules And Expansion Cables
Assembling an UltraSCSI RAID Subsystem Installing the I/O Modules and Expansion Cables Six single-ended I/O modules (DS–BA35X–MN) mount on the lower rear enclosure shroud (see C 1 in Figure B–2). Expansion ALLOUT cables attach to these I/O modules for an expanded subsystem, connecting one or two additional enclosures to the master enclosure.
Page 177: Installing Array Controllers And Cache Modules
Assembling an UltraSCSI RAID Subsystem Installing Array Controllers and Cache Modules The master enclosure contains the array controllers and cache modules. ECBs cannot be installed within the enclosure. In a departmental server cabinet, install the ECBs in the top cover. In a data center cabinet (SW600 series), install the ECBs within an ECB shelf mounted inside the cabinet.
Page 178: Table B-1 Installing Array Controllers And Cache Modules
Assembling an UltraSCSI RAID Subsystem Table B–1 describes the mechanical procedures for installing array controllers and cache modules. Following installation, configure the subsystem using procedures contained in the following publications: • Array controller documentation • Operating system-specific release notes Note For single array controller and cache set configurations, Controller A must be configured with Cache A or Controller B must be configured with Cache B.
Page 179 Assembling an UltraSCSI RAID Subsystem Table B–1 Installing Array Controllers and Cache Modules (Continued) Insert the array controller into the Controller A slot and push it in until the extractor latches engage the enclosure. CXO5602A Simultaneously push in both extractor latches to firmly seat the array controller.
Page 180 Assembling an UltraSCSI RAID Subsystem Table B–1 Installing Array Controllers and Cache Modules (Continued) If a second array controller and cache module set is required, repeat steps 2 through 7 using Controller B and Cache B slots (C ALLOUTS and 4) shown below. 19 20 21 22 23 24 Shelf 4 13 14 15 16...
Page 181: Installing The Power System
Assembling an UltraSCSI RAID Subsystem Installing the Power System The ac input boxes and shelf power supplies comprise the enclosure power system (see Figure B–4). Figure B–4 Enclosure Power System CXO5800A Caution To protect this sensitive electronic device from ESD, use the following precautions: •...
Page 182: Connecting Subsystem Cables
Assembling an UltraSCSI RAID Subsystem Connecting Subsystem Cables Cabinet user documentation describes the cable routing, location, and function. The cables involved might include: • Controller-to-controller • Controller-to-host • ECB-to-cache module For a detailed description of the cable connection procedures and cable routing, refer to the following publications: •...
Page 183: Appendix C, Installing Emu Microcode
Appendix C Installing EMU Microcode The microcode resident in the EMU memory controls all the UltraSCSI RAID enclosure (DS–BA370 series) EMU operations. Proper operation of the subsystem requires that all EMUs have the same revision level microcode. Upon system startup, the master EMU polls the expansion EMUs to ensure that they have the correct microcode.
Page 184: Prerequisites
EMU microcode file (for example, FLSH_011.HEX) • • Communications program, such as PROCOMM PLUS • Compaq adapter cable, part number 17–04697–01, with the following connectors: — 9-pin RS232 — 8-pin RJ45 Preliminary Procedure Complete the procedure in Table C–1 prior to starting the installation procedure.
Page 185 Installing EMU Microcode Table C–1 Preliminary Procedures (Continued) Use the PROCOMM PLUS Setup Utility to establish the following parameters for modem and protocol options: Modem Options General Options Auto baud detect Send init if CD high Protocol Options General Options Abort xfer if CD lost ASCII Protocol Options Character pacing (millisec)
Page 186: Preparing The Emu
Installing EMU Microcode Preparing the EMU Complete the procedure in Table C–2 to prepare the EMU for loading the microcode. Table C–2 Preparing the EMU On the master enclosure, press and hold-in the alarm control switch while removing the EMU from the enclosure. The PVA audible alarm sounds, indicating that there is no EMU in the enclosure, and continues to sound until the EMU is reinserted.
Page 187: Table C-4 Typical Pc Monitor Display
Installing EMU Microcode Table C–4 Typical PC Monitor Display Display Text Comments EMU successfully completed SW 370 EMU (ROM) Version V01.02 Copyright © 1997, Digital Equipment Corporation boot. Communications program +++ Attempting to load FLASH image from UART +++ Download Parameters parameters.
Page 188: Table C-5 Restarting The Controller
Installing EMU Microcode Restarting the Controller Complete the procedure in Table C–5 to restart the controller after the microcode upgrade is loaded. Table C–5 Restarting the Controller Remove the 8-pin RJ45 connector from the EMU UART connector. On each controller, press and hold-in the reset button and reseat its PCMCIA card.
Page 189 Glossary This glossary defines terms pertaining to the DS-BA370 series UltraSCSI RAID enclosure. It is not a comprehensive glossary for all StorageWorks products. ac distribution The method of distributing ac power within a StorageWorks shelf, enclosure, or cabinet. ac input box A device that receives ac power from the PDU and distributes the ac power to all shelf power supplies connected to the ac input box power bus.
Page 190 Glossary ambient air temperature The temperature of the air surrounding the cabinet, enclosure, shelf, or SBB that dissipates the heat generated by the device. See also intake air temperature. array controller See controller. backplane The electronic printed circuit board mounted in the rear of the shelf. This board contains the disk drive SBB, power supply, and terminator connectors.
Page 191 Glossary Caution The device transceiver type (single-ended or differential) must match the bus segment type. Devices that do not meet this condition cannot operate. The allowed length of a bus segment depends on the electrical loading, transmission media type, and data transfer rate. In many cases, heavier loading, smaller wires, and higher speeds demand shorter lengths.
Page 192 A storage device tested in a specific configuration and found to be in compliance with either an FCC or a CE certification standard. Compaq certifies these devices to operate in a specific shelf, enclosure, or cabinet. channel Another term for a SCSI bus.
Page 193 Glossary converter See SCSI bus signal converter. data center cabinet The largest of the StorageWorks cabinets, such as the SW800 series that can contain as many as 24 drive SBB shelves. These cabinets include either a 50 Hz or 60 Hz cable distribution unit (CDU), internal ac power cords, and cooling fans.
Page 194 Glossary External cache battery. A device that provides backup power to a cache module for sustaining memory retention. electromagnetic interference See EMI. electrostatic discharge See ESD. Electromagnetic compatibility. Electromagnetic interference. The impairment of a signal by an electromagnetic disturbance. Environmental monitoring unit. The device that monitors the status of the UltraSCSI RAID enclosure to include power, intake air temperature, blower status, and so forth, detects error and fault conditions, displays these conditions, reports the conditions to the...
Page 195 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 — Establishing SCSI bus device addresses 8, 9, 10, and 11 3 —...
Page 196 Glossary Federal Communications Commission See FCC. filler panel A panel used to cover open unused areas in cabinets or shelves for either EMI suppression, air flow control, or cosmetic purposes. host The primary or controlling computer (in a multiple computer network) to which storage is attached.
Page 197 Glossary HSOF Hierarchical Storage Operating Firmware. HS-family controller software contained on a removable ROM card (PCMCIA). Identifier—as used in SCSI bus ID, target ID or device ID. initiator A SCSI device (usually a host system) that requests another SCSI device (a target) to complete an operation. I/O module Input/output module.
Page 198 Glossary master enclosure The UltraSCSI RAID enclosure that includes the HSZ series controllers and cache modules. There is only one master enclosure in each UltraSCSI RAID subsystem. The SCSI bus address switch setting is always 0. Using address 0 automatically assigns SCSI bus device addresses 0, 1, 2, and 3 to the devices.
Page 199 Glossary physical bus Two SCSI terminators separated by cables, connectors, and backplane circuitry. port (1) A logical route for data in and out of an array controller. A port can contain one or more channels, all of which contain the same type data.
Page 200 Glossary redundant power supply configuration A capability of StorageWorks cabinet and shelves to ensure that there is no single point of power failure. (1) For a cabinet, two ac power sources and two distribution units or ac input boxes distribute primary and redundant ac power to shelf power supplies.
Page 201 Glossary SCSI device A host computer adapter, a peripheral array controller or an intelligent peripheral that can be attached to the SCSI bus. 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. Domains with multiple bus segments are enabled through the use of bus extenders.
Page 202 Glossary See also spin-up. spin-up A 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 operations. See also spin-down. standard power configuration A power configuration in which there is only one ac power source and cabinet distribution unit, power distribution unit, or ac input box to condition the input ac power.
Page 203 (for example, FCC, CE–Mark, CSA, TÜV, VDE, and so forth) and with all Compaq standards. (2) A device supported by an array controller or host operating system. target A SCSI device that performs an operation requested by an initiator.
Page 204 A 3-way SCSI connector. UltraSCSI An improvement in SCSI technology invented in 1993 by the Digital Equipment Corporation (now Compaq Computer Corporation) StorageWorks Engineering Group. Subsequently, the ANSI SCSI standards committee issued standard X3T10 for UltraSCSI. The UltraSCSI improvements over Fast SCSI include the following: •...
Page 205 Glossary UltraSCSI RAID subsystem One or more UltraSCSI RAID enclosures mounted in either a pedestal or a cabinet. Each subsystem requires a master enclosure. Adding one or two expansion enclosures to any single-enclosure subsystem creates an expanded subsystem. VHDCI Very high density cable interconnect. A 68-pin interface cable with connectors on 0.8 mm centers.

Compaq StorageWorks DS-BA370 Series User Manual

Preface

Manufacturer's Declarations

Chapter 1, Introducing the Ultrascsi RAID Enclosure

Chapter 2, Operating the Ultrascsi Enclosure

Chapter 3, Environmental Monitoring Unit

Chapter 4, Power Verification and Addressing

Chapter 5, Single-Ended I/O Module

Chapter 6, Power Distribution

Chapter 7, Storage Devices

Chapter 8, Enclosure Blowers

Appendix A, Ultrascsi Enclosure Specifications

Appendix B, Assembling an Ultrascsi RAID Subsystem

Appendix C, Installing EMU Microcode

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Summary of Contents for Compaq StorageWorks DS-BA370 Series