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- Page 1 Enclosure 4200 Family LVD Disk Enclosure User Guide Part Number: EK–SW2ZS–UA. B01 / 148451-002 Second Edition (December 1999) Part Number: EK–SW2ZS–UA. B01 / 148451-002 Compaq Computer Corporation...
- Page 2 While Compaq Computer Corporation believes the information included in this manual is correct as of the date of publication, it is subject to change without notice. Compaq makes no representations that the interconnection of its products in the manner described in this document will not infringe on existing or future patent rights, nor do the descriptions contained in this document imply the granting of licenses to make, use, or sell equipment or software in accordance with the description.
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Page 3: Table Of Contents
Contents About This Guide Intended Audience ........... ix How this Guide is Arranged . - Page 4 Compaq Enclosure 4200 Family LVD Disk Enclosure User Guide Module Power Protection......... 3–3 SCSI Bus Termination .
- Page 5 Contents Replacing a Power Supply or Blower ........6–4 Chapter 7 Replacing CRUs Ordering a CRU .
- Page 6 Figure 3–6. Dual-bus I/O module components......3–7 Figure 4–1. Model 4200-series LVD disk enclosure EMU ....4–1 Figure 4–2.
- Page 7 Tables Tables Table 1–1 CRU Replacement Methods ........1–8 Table 2–1 Enclosure–Host Controller Maximum Cable Lengths .
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Page 9: About This Guide
About This Guide Intended Audience This publication is designed for use by Compaq StorageWorks users who are responsible for installing and maintaining the rack mounted (models 4214R and 4254R) and the tower mounted (models 4214T, and 4254T) Ultra2 SCSI low voltage differential (LVD) disk enclosures. - Page 10 Compaq Enclosure 4200 Family LVD Disk Enclosure User Guide Chapter 4, “Environmental Monitoring Unit” This chapter describes the EMU and the high availability fault bus. Chapter 5, “Disk Drives” This chapter describes the disk drives, operation, and status reporting. Chapter 6, “Enclosure Power and Cooling”...
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Page 11: Documentation Conventions
About This Guide Documentation Conventions Table 1 is a list of the documentation conventions and symbols used in this publication. Table 1 Text Symbols Text Entries Boldface type—Boldface type indicates the first instance of terms being defined in the text, the glossary, or both. - Page 12 Compaq Enclosure 4200 Family LVD Disk Enclosure User Guide Table 1 Text Symbols (Continued) Status LED Symbols LED is O LED is O LED is F LASHING Table 2 is a list of the symbols that appear on devices and in this publication.
- Page 13 About This Guide xiii Table 2 Device Symbols (Continued) EMU Symbols EMU Status LED symbol (green) I/O Module Symbols Power Status (O ) LED (green) Terminator Status LED (green) SCSI Bus A Connector Ultra2 SCSI Bus Input Connector ISCSI Bus B Connector Ultra2 SCSI Bus Input Connector Drive LED Symbols...
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Page 14: Related Documents
Compaq Enclosure 4200 Family LVD Disk Enclosure User Guide Related Documents Table 3 lists publications that contain additional information relevant to the LVD disk enclosure products. Table 3 Related Publications Publication Title Part Number Compaq StorageWorks 127430-001 Disk Enclosure RETMA Rack Mounting Kit Installation Card... -
Page 15: Introducing The Enclosure
Chapter Introducing the Enclosure This chapter describes the StorageWorks Enclosure 4200 family of low voltage differential (LVD) disk enclosures (see Figure 1–1 and Figure 1–2). These enclosures support Wide-Ultra and Wide-Ultra2 small computer system interface (SCSI) protocols. The internal bus supports only LVD drives. The external bus (the enclosure to the host controller bus) supports either Wide-Ultra2 (LVD) and or Wide-Ultra single-ended (SE) SCSI protocols. -
Page 16: Disk Enclosure Features
1–2 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide CXO7082A Figure 1–2. Disk enclosure (rear view) Disk Enclosure Features The Model 4214- and Model 4254-series enclosures support fourteen, 1-inch, 3.5-inch form factor hard disk drives or drive blanks. These enclosures are available in either a rack mountable version (4214R) or in a tower version (4214T). -
Page 17: Scsi Buses
Wide-Ultra or Wide-Ultra2, LVD or SE. The SCSI bus type determines the length of this bus, and therefore, the maximum cable length. The standard Compaq cable length of 12 ft (3.7 m) ensures satisfactory operation. As for all SCSI buses, the shorter the cable, the more efficient the bus operation. -
Page 18: Power Supplies
1–4 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Power Supplies In a single power supply configuration, the failure of a power supply disables the enclosure. Use the optional redundant power supply configuration to prevent this. In this configuration, the failure of a single power supply or blower does not disable the enclosure. -
Page 19: Figure 1-3. 14-Drive Enclosure Bays
Introducing the Enclosure 1–5 — Drive Bays — Enclosure Status LEDs (see Figure 1–4) CXO6728A Figure 1–3. 14-drive enclosure bays... -
Page 20: Figure 1-4. Enclosure Status Leds
1–6 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide The enclosure status LEDs are located in the front, lower-right corner of the enclosures (see Figure 1–4). Enclosure Status (F LASHING Enclosure Power (O Enclosure Fault (O Figure 1–4. Enclosure status LEDs The I/O module, power supplies, blowers, EMU, and cables mount in the rear of the enclosure (see Figure 1–5). -
Page 21: Major Elements
(CRU). When special tools or techniques are required to replace an element, then the unit is a field replaceable unit (FRU). Only qualified, Compaq field service personnel are authorized to replace FRUs. There are no FRUs for these products. -
Page 22: Table 1-1 Cru Replacement Methods
1–8 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Table 1–1 CRU Replacement Methods Element Method Drive Hot-pluggable Hot-pluggable Blower Hot-pluggable I/O Module Pluggable Power Supply–Dual Hot-pluggable Power Supply–Single No Power Applied SCSI Bus Cables Pluggable 1. Replacing an I/O module requires stopping all data transfers. -
Page 23: Starting The Enclosure
Chapter Starting the Enclosure With the enclosure installed in a a rack or tower it is necessary to: 1. Connect the SCSI bus cables. 2. Apply power. 3. Verify proper operation. Connecting the SCSI Bus Cables Connecting the enclosure to a host adapter or SCSI bus controller is simply a matter of connecting cables to the I/O module. -
Page 24: Figure 2-1. Single-Bus I/O Module Cable Connector
2–2 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide SCSI Bus A connector CXO7062A Figure 2–1. Single-bus I/O module cable connector... -
Page 25: Figure 2-2. Dual-Bus I/O Module Cable Connectors
Figure 2–2. Dual-bus I/O module cable connectors The maximum cable length is a function of the bus type (LVD or SE). See Table 2–1 for the maximum Compaq supported SCSI bus cable lengths. Table 2–1 Enclosure–Host Controller Maximum Cable Lengths... -
Page 26: Table 2-2 Drive Enclosure-Host Controller Scsi Cables
2–4 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Table 2–2 describes the compatible host controller to LVD disk enclosure cables. Table 2–2 Drive Enclosure—Host Controller SCSI Cables Description Length SCSI Cable—68-pin VHDCI to 68-pin VHDCI 68-conductor SCSI cable with: 3 m (9.8 ft) - Page 27 Starting the Enclosure 2–5 Table 2–2 Drive Enclosure—Host Controller SCSI Cables (Continued) Description Length Adapter Cable—68-pin High Density to 68-pin VHDCI 68-conductor SCSI cable with 3.7 m (12 ft) 1 High-Density straight plug connector with jack screws 1 Vertical Offset VHDCI straight plug connector with jack screws CXO6955A...
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Page 28: Applying Power
2–6 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Table 2–3 Installing SCSI Bus Cables 1. Stop all SCSI bus data transfers. 2. Align the D-shaped cable connector with D-shaped I/O module connector CXO7062A 3. Firmly seat the cable connector on the module connector. -
Page 29: Verifying Operation
Starting the Enclosure 2–7 Verifying Operation Elements begin operating when power is applied. Check the enclosure status LEDs in the front, lower right corner (see Figure 2–3). If the display is not exactly as shown, there is an element error condition. Check the drive and enclosure status LEDs on the front and the EMU, power supplies, blowers, and I/O module status LEDs on the rear (see Figure 2–4) to determine the defective element. -
Page 30: Figure 2-4. Rear Status Leds
2–8 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Figure 2–4. Rear status LEDs... -
Page 31: I/O Modules
Chapter I/O Modules This chapter discusses the operation and function of the single- (see Figure 3–1) and dual-bus (see Figure 3–2) LVD disk enclosure pluggable I/O modules (commonly referred to as the “module”). The first part discusses the general and common features of all modules. -
Page 32: Common Features
3–2 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Common Features The following features are common to both the single- and the dual-bus I/O modules. These modules are pluggable elements. Replacing either I/O modules or the cables requires stopping all data transfers to prevent the loss of data. -
Page 33: Module Power Protection
I/O Modules 3–3 Module Power Protection A +5 VDC sensor in the module detects overcurrent conditions. Should this error occur, the sensor disconnects the voltage from the module and the power LED is O . This disables the module until one of the following conditions occurs: The overcurrent condition no longer exists. -
Page 34: Status Leds
3–4 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Status LEDs The green LEDs display the status of the external SCSI bus terminators and the I/O module power. Terminator LED The I/O module label identifies the SCSI bus LED with a letter (A or B) above the LED and the terminator symbol below the LED. -
Page 35: Replacing An I/O Module
I/O Modules 3–5 Replacing an I/O Module To replace an I/O module, you must complete the procedures outlined in Chapter 6, “Replacing CRUs.” Single-Bus Module This section describes the components and unique features of the single-bus module. This module (see Figure 3–5) has one VHDCI connector and two LEDs. Latch Status LEDs –... -
Page 36: Single-Bus I/O Module Status Displays
3–6 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Single-Bus I/O Module Status Displays Table 3–1 describes the single-bus I/O module LED status displays. Table 3–1 Single-Bus Status LED Displays LED is O LED is O LED is F... -
Page 37: Dual-Bus I/O Module
I/O Modules 3–7 Dual-Bus I/O Module This section describes the unique features and components of the dual-bus module. This module (see Figure 3–6) is easily identifiable by the two VHDCI connectors and the three LEDs. Latch SCSI Bus A connector Status LEDs –Power —SCSI bus A... -
Page 38: Dual-Bus I/O Module Status Displays
3–8 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Dual-Bus I/O Module Status Displays Table 3–3 describes.dual-bus I/O module status LEDs displays. Table 3–3 Dual-Bus Status LED Displays LED is O LED is O LED is F LASHING... -
Page 39: Dual-Bus Scsi Address Maps
I/O Modules 3–9 Dual-Bus SCSI Address Maps The module assigns a SCSI address to each drive bay in the enclosure using a SCSI address map (see Table 3–4). Table 3–4 Dual Bus SCSI Bus IDs 14–Disk Enclosure SCSI Bus A SCSI Bus B SCSI... -
Page 41: Environmental Monitoring Unit
Environmental Monitoring Unit The Compaq StorageWorks Environmental Monitoring Unit, the EMU, (see Figure 4–1) is an integral part of every Model 4200 series LVD enclosure. This element performs several functions, including monitoring the enclosure operation, detecting and indicating errors, and displaying the EMU and enclosure status. -
Page 42: Functions
4–2 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide The EMU mounts in the bay at the left rear of the enclosure (see Figure 4–2). Figure 4–2. Model 4200-series LVD disk enclosure EMU location Functions The EMU functions include:... -
Page 43: Status Leds
Environmental Monitoring Unit 4–3 Status LEDs The EMU status LED (see Figure 4–1) displays the status of the EMU and notifies the user when there is a single-ended drive installed. The three status LEDs (see Figure 4–3) display the status of the EMU and the enclosure, the enclosure power, and an enclosure fault. -
Page 44: Temperature
The Ultra2 SCSI bus controllers and adapters can control RAID subsystems, such as those using StorageWorks Model 4200 LVD disk enclosures. Although the bus is a data interchange facility it does not provide the features necessary to permit a controller to monitor enclosure and storage device status. -
Page 45: Device Swap Signal
Environmental Monitoring Unit 4–5 This signal is asserted (high) when all the power supplies and blowers are operating properly. Should any power supply or blower be operating outside of a specified range this signal level is low until the fault is corrected. Device Swap Signal This fault bus signal (SWAP) detects the removal or insertion of a storage device on a SCSI bus causing the signal to generate a logic low pulse. -
Page 47: Disk Drives
Chapter Disk Drives The enclosure supports Compaq hot-pluggable, Wide-Ultra2 SCSI, LVD disk drives. This chapter describes the disk drive features, functions, and characteristics. The 14-disk enclosure supports 1.0-inch, 3.5-inch form factor drives mounted in a carrier Figure 5–1. CAUTION: Controlling airflow within the enclosure requires installing a disk drive or a drive blank in each drive bay. -
Page 48: Status Reporting
5–2 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Status Reporting All drives have three status LEDs (see Figure 5–2) to define the operational status of the drive. To determine the drive status you must observe all three LEDs (see Table 5–1). -
Page 49: Drive Status
Disk Drives 5–3 Drive Status The two green and one amber LEDs are either O , or F . Since the status LASHING LED displays are easily interpreted, they are the most commonly used indicators of drive status. In some configurations, the host controller can control the status LEDs. The symbols for these conditions are shown in Table 5–1. -
Page 50: Drive Power
5–4 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Table 5–1 Drive LED Status Displays (Continued) LED is O LED is O LED is F LASHING Display Status Drive Replacement The operational drive is being accessed. or spinning-up. -
Page 51: Drive Blank
Disk Drives 5–5 Drive Blank To maintain the proper enclosure airflow, there must be a drive or a drive blank in each drive bay. The function of the drive blank Figure 5–1 is to control airflow within a bay. CXO6824A Figure 5–3. -
Page 52: Replacing A Disk
NOTE: Removing a drive from the enclosure affects the air flow in the enclosure. This can result in an overheating condition that could affect disk reliability. Compaq recommends installing a disk drive of equal or greater capacity, or a disk drive blank as soon as possible. -
Page 53: Enclosure Power And Cooling
Chapter Enclosure Power and Cooling This chapter describes the function and general operation of the enclosure power supply and Blowers. See Figure 6–1 for major component locations. Power Supply Element AC Input Connector Module Latch Status blower LED Blower Tabs Blower Element CXO6809A Figure 6–1. -
Page 54: Enclosure Power
6–2 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Enclosure Power The power supply and blower assembly mount in the rear of the enclosure. The supply is auto-ranging and operates on an AC input voltage of 100 to 240 VAC ±10%, 50 to 60 Hz ±... -
Page 55: Temperature Sensing
Enclosure Power and Cooling 6–3 The blower mounting assembly is the element for mounting the second blower. This element has no power circuitry. It does contain a circuit board for processing signals to and from the blower. Temperature Sensing The power supply uses the internal temperature of the supply to set the speed of the blower. -
Page 56: Status Reporting
6–4 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Status Reporting The green status LED on the blower displays the status of either the power supply or the blower. See Table 6–1 for definitions of the LED displays. -
Page 57: Replacing Crus
Each replacement CRU kit contains detailed replacement instructions. This chapter describes the general replacement procedures. Ordering a CRU To order a CRU, you must use the Compaq spare part number.This number is located in the upper-right corner of the product label (see Figure 7–1). CXO7083A Figure 7–1. -
Page 58: Basic Replacement Procedures
7–2 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide 2. Do not remove the CRU from the static-free container until you are ready to install it. 3. Avoid touching the CRU connector pins, leads, or circuitry. Basic Replacement Procedures The procedures in Table 7–1 apply to all the CRU replacement procedures. -
Page 59: Initial Installation
24 lb (11.3 kg). Even though a single person can lift this weight, the physical size makes it very difficult to install. Compaq requires a minimum of two individual to install an empty enclosure in a rack or tower. -
Page 60: Replacing A Drive
If a disk drive fails, you must replace it with a drive or a drive blank using the procedure in Table 7–2. NOTE: For the latest information and instructions about Compaq hard drives, such as compatibility and installation instructions, refer to the Technical Information area of the following Compaq website. - Page 61 Replacing CRUs 7–5 Table 7–2 Installing a Drive (Continued) When you are sure that the disk is no longer spinning, remove the drive from the enclosure. Insert the replacement drive or the drive blank part-way into the until it is against the backplane connector To install a drive blank, press it firmly in to seat it in the connector To install a drive, push in on the drive while pivoting the Release Lever...
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Page 62: Replacing The Variable Speed Blower
7–6 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Replacing the Variable Speed Blower NOTE: Removing a blower does not change the airflow within the enclosure. However, do not remove a blower until the replacement blower is available. - Page 63 Replacing CRUs 7–7 Table 7–3 Blower Replacement Procedure (Continued) CAUTION: Pressing on the center section of the blower can damage the blades. Only press on the outer shroud when installing the blower. Align the blower guide post with power supply connector .
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Page 64: Replacing The Emu
7–8 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Replacing the EMU NOTE: Removing an EMU significantly changes the airflow within the enclosure. Therefore, always replace it as soon as possible. The basic procedure for replacing an EMU is the same regardless of the system. -
Page 65: Replacing A Power Supply
Replacing CRUs 7–9 Replacing a Power Supply CAUTION: Removing a power supply significantly changes the airflow within the enclosure. The system could shutdown unless the power supply is replaced within 5 minutes. NOTE: Replacement power supply assemblies do not include a variable speed blower. Therefore you must remove the operational blower from the defective power supply and install it on the new supply before you remove the defective power supply. - Page 66 7–10 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Table 7–5 Power Supply Replacement Procedure (Continued) CAUTION: A Pressing on the center section of the blower can damage the blades. Only press on the outer shroud when installing the blower.
- Page 67 Replacing CRUs 7–11 Table 7–5 Power Supply Replacement Procedure (Continued) While lifting up on the module latch , grasp the blower element shell and pull the power supply to the rear. CXO6809A CAUTION: Pressing in on the center section of the blower shroud can damage the blower blades.
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Page 68: Replacing The I/O Module
7–12 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Replacing the I/O Module CAUTION: Interrupting the SCSI bus by replacing an I/O module could cause the loss of data. Therefore, you must stop all SCSI bus data transfers before replacing a module. - Page 69 Replacing CRUs 7–13 (Continued) Table 7–6 I/O Module Replacement Procedure Slide the replacement module into the enclosure. While grasping the module handle, press the module latch down and push the module into the enclosure until it is fully seated. Connect the cable connector to the same connectors (see Step 2). Activate the SCSI bus and observe the LEDs to verify that the module is functioning properly.
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Page 71: Appendix A Regulatory Notices
Appendix Regulatory Notices FCC Class B Certification This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. Any changes or modifications made to this equipment may void the users authority to operate this equipment. -
Page 72: Country-Specific Certifications
A–2 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosure User Guide Country-Specific Certifications Compaq tests all the electronic products for compliance with country-specific regulatory requirements either as an individual item or as part of an assembly. The product label (see Figure A–1) specifies the regulations with which the product complies. -
Page 73: Appendix B Specifications
The weight of the disk enclosure with the elements installed WARNING: always requires at least two individuals to move it. Compaq recommends using fork lifts or hand trucks to move an enclosure in its shipping container. Table B–1 defines the dimensions and weights of the enclosure. Table B–2 defines the... -
Page 74: Table B-1 Disk Enclosure Physical Specification
B–2 Compaq StorageWorks 4200 Family LVD Disk Enclosure User Guide Table B–1 Disk Enclosure Physical Specification Horizontal Orientation Vertical Orientation Empty Installed Shipping Carton Shipping Carton and Pallet Height 5.16 in (13.1 cm) 5.16 in (13.1 cm) 25.25 in (64.1 cm) 30.25 in (76.8 cm) -
Page 75: Environmental Specifications
Specifications B–3 Table B–2 Element Physical Specifications (Continued) Vertical Orientation Horizontal Orientation Installed Shipping Carton I/O Module Height 4.5 in (12.7 cm) 8.5 in (21.6 cm) Depth 9.5 in (24.1 cm) 13.0 in (33.0 cm) Width 1.625 in (4.1 cm) 4.5 in (11.4 cm) Weight 1.3 lb (0.6 kg) -
Page 76: Power Specifications
B–4 Compaq StorageWorks 4200 Family LVD Disk Enclosure User Guide When shipping this product, or placing it in short term storage, Compaq recommends maintaining the environmental conditions listed in Table B–4. Table B–4 Shipping or Short Term Storage Specifications Ambient Temperature: –40°C to +66°C (–40°F to +150°F) -
Page 77: Glossary
Glossary A panel or enclosure that is 5.25 inches (133.35 mm) high. Alternating current. The abbreviation for alternating current. DO NOT use AC distribution The method of distributing AC power within a StorageWorks enclosure, tower, or rack (cabinet). AC power supply See power supply. - Page 78 Glossary–2 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosures User Guide carrier The container in which storage devices are mounted to form CRUs. Carriers are available in 3.5-inch form-factors for both low-profile (1.0-in) and half-height (1.6-in) disks. CE-Mark A European Economic Community (EEC) certification label that identifies electronic devices authorized for sale within member nations.
- Page 79 Glossary–3 drive blank A carrier that is required to control airflow within the enclosure whenever there is less than a full complement of disk drives in an enclosure. The only function of a drive blank is to control airflow within the disk enclosure.
- Page 80 Glossary–4 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosures User Guide environmental See EMU. monitoring unit Electrostatic discharge (ESD). The discharge of a potentially harmful static electric voltage which is a result of improper grounding. See blower. fault bus The StorageWorks implementation of an additional high-availability subsystem monitoring capability for storage devices.
- Page 81 SCSI protocol, and normally operates in the initiator role. hot-pluggable An element that can be replaced without removing power from the enclosure or interrupting the transfer of data over the SCSI bus. Compaq disk drives are hot pluggable. See also pluggable.
- Page 82 Glossary–6 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosures User Guide mean time between See MTBF. failures modular carrier See carrier. mounting brackets The brackets used for mounting StorageWorks enclosures in a cabinet. mounting rail The surface of a rack on which panels mount. (Per EIA Standard RS-310-C.)
- Page 83 Glossary–7 RAID Redundant array of independent disks. A set of storage techniques devised to increase the performance and availability of a storage subsystem. redundant array of See RAID. independent disks redundant power A capability of StorageWorks cabinet and enclosures to ensure there is no configuration single point of power failure.
- Page 84 Glossary–8 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosures User Guide SCSI ID (1.) 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 referred to as “target ID”. (2.) The unique device identification number assigned to each target or initiator on a single SCSI bus.
- Page 85 StorageWorks configuration (that is, enclosure, 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 Compaq standards. (2) A device supported by a controller or host operating system. target A SCSI device that performs an operation requested by an initiator.
- Page 86 Glossary–10 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosures User Guide Ultra SCSI The Ultra SCSI improvements over Fast SCSI include the following: • Maximum transfer rate increases from 10 MHz to 20 MHz. • Maximum wide bus bandwidth increases from 20 MB/sec to 40 MB/sec.
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Page 87: Index
Index simultaneous 6–2 status 5–3 air flow 7–4 status LEDs airflow 1–3 displays 5–3 drive activity 5–2 backplane 1–3 drive failure 5–2 bay numbering 1–4 on-line 5–2 bays, See enclosure. dual-bus I/O module 3–7 blower 1–2 power B–4 electromagnetic interference. See EMI. EMI 1–3 CRUs 1–7 EMU 1–2... - Page 88 Index––2 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosures enclosure 7–3 installation 1–4 air flow 6–3 removal 1–4 bays 1–4 dual-bus 1–3 1–7 3–7 cooling 6–3 power disconnect 3–3 features 1–2 single-bus 1–3 1–7 3–5 installation 7–3 layout-rear 1–6 labels overheating 5–6...
- Page 89 Index–3 installation 1–4 connecting 2–1 removal 1–4 disconnecting 2–1 diagnostic information 6–2 installing 2–6 module latch 6–1 controller 2–1 power ratings 6–2 dual-bus configuration 2–1 protection 6–2 internal 1–3 status dual-bus 1–3 LED 6–1 6–4 single-bus 1–3 LED display 6–4 single-bus configuration 2–1 reporting 6–2 6–4...
- Page 90 Index––4 Compaq StorageWorks Enclosure 4200 Family LVD Disk Enclosures status displays 1–4 disk drives 1–4 Ultra SCSI bus 1–1 EMU 1–4 Ultra2 SCSI bus 1–1 5–1 enclosure 1–4 controller 3–2 I/O module 1–4 internal 1–1 power supply 1–4 LVD 1–2 status monitoring 1–4...