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- Page 1 Enclosure 4200 Family LVD Disk Enclosures User Guide First Edition (July 1999) Part Number: EK–SW2ZS–UG. A01 / 148451–001 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 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
About This Guide Chapter 1 Introducing the Enclosure Disk Enclosure Features ............1–2 SCSI Buses . - Page 4 Enclosure 4200 Family LVD Disk Enclosures Users Guide Single-Bus Module ............3–2 SCSI Bus Connectors.
- Page 5 Environmental Specifications ........... B–4 Power Specifications .
- Page 6 List of Figures Figure 1–1. Disk Enclosure (Front View) ......... 1–1 Figure 1–2.
- Page 7 List of Tables Table 1 Documentation Conventions ..........xi ii Table 2 Related Publications .
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Page 8: About This Guide
Intended Audience This publication is designed for use by Compaq StorageWorks users who are responsible for installing and maintaining the Model 4214R (rack) and 4214T (tower) Ultra2 SCSI low voltage differential (LVD) disk enclosures. How this Guide is Arranged This manual discusses the product features and operations from the general to the specific. - Page 9 Enclosure 4200 Family LVD Disk Enclosures Users Guide Chapter 4, “Disk Drives” This chapter describes the disk drives, operation, and status reporting. Chapter 5, “Enclosure Power and Cooling” The chapter describes the power supply and fan operation and status reporting.
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Page 10: Table 1 Documentation Conventions
Documentation Conventions The documentation conventions used in this publication are shown in Table 1. Symbol Boldface type Boldface type indicates the first instance of terms being defined in the text, the glossary, or both. Italic type indicates one of the following: italic type Caution Text symbol for information essential to avoid damaging software, hardware, or... - Page 11 Enclosure 4200 Family LVD Disk Enclosures Users Guide Table 1 Documentation Conventions (Continued) Symbol Description I/O module LED label Power Status (O ) or EMU Locate (F ) LED (green) LASHING I/O module label Ultra2 SCSI, Single Bus, LVD input connector...
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Page 12: Table 2 Related Publications
Related Documents Table 2 lists publications that contain additional information relevant to the LVD disk enclosure products. StorageWorks Publication Title Disk Enclosure RETMA Rack Mounting Kit Installation Card Disk Enclosure RETMA Rack Mounting Template Environmental Monitoring Unit for Enclosure Models 4214R and 4214T User Guide Hot-Pluggable Wide-Ultra2 SCSI Hard Drives Installation Card Replacing a Disk Enclosure Environmental Monitoring Unit Installation Guide Replacing a Disk Enclosure Power Supply Installation Guide... -
Page 13: Introducing The Enclosure
Chapter Introducing the Enclosure This chapter describes of 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 14: Disk Enclosure Features
1–2 Enclosure 4200 Family LVD Disk Enclosures User Guide Figure 1–2. Disk Enclosure (Rear View) Disk Enclosure Features The Model 4214 enclosure supports up to fourteen, 1-inch high, 3.5-inch form factor hard disk drives. This enclosure is available in either a rack mountable version (4214R) or in a tower (4214T). -
Page 15: 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 16: Status Monitoring And Display
1–4 Enclosure 4200 Family LVD Disk Enclosures User Guide Status Monitoring and Display The major status monitoring capabilities of these enclosures include: Displaying the enclosure status on the enclosure LEDs Displaying the element status on the power supply, EMU, drive, and I/O module LEDs... -
Page 17: Figure 1-3. Front Mounted Elements
Figure 1–3. Front Mounted Elements The I/O module, power supplies, fans, EMU, and cables mount in the rear of the enclosure (see Figure 1–4). Fan 1 Power Supply Bay 1, or Fan Mounting Assembly 1. In a single power supply configuration, the fan mounts on the fan mounting assembly. Figure 1–4. -
Page 18: Major Elements
1–6 Enclosure 4200 Family LVD Disk Enclosures User Guide Major Elements The elements each enclosure requires for proper operation include: An EMU Two power supplies, or 1 power supply and 1 fan mounting assembly Two Fans An I/O module A disk drive or disk drive blank in each bay... - Page 19 Table 1–1 CRU Replacement Methods (Continued) Element I/O Module Power Supply–Dual Power Supply–Single SCSI Bus Cables 1. In a single power supply configuration, the enclosure is disabled when the power supply fails. Introducing the Enclosure 1–7 Method Hot-pluggable Hot-pluggable Hot-pluggable No Power Applied Pluggable...
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Page 20: Starting The Enclosure
With the enclosure installed in 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 21: Figure 2-1. Single Bus Cable Connection
2–2 Enclosure 4200 Family LVD Disk Enclosures User Guide Primary host controller connector Figure 2–1. Single Bus Cable Connection Table 2–1 lists the host array controller cables available. As for any SCSI bus, using the shortest length cable possible enhances performance. - Page 22 Table 2–1 SCSI Bus Cables (Continued) Description 68-conductor SCSI cable with 1 High-Density straight plug connector with jack screws 1 Vertical Offset VHDCI straight plug connector with jack screws 1. One cable provided with each enclosure. 2. Use only with Ultra2 SCSI LVD bus operating at speeds of 80 Mb/sec or less. Starting the Enclosure 2–3 Length...
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Page 23: Applying Power
2–4 Enclosure 4200 Family LVD Disk Enclosures User Guide 1. Stop all SCSI bus data transfers. 2. Align the D-shaped cable connector with D-shaped I/O module connector. 3. Firmly seat the cable connector on the module connector. 4. Finger tighten the thumbscrews to fully seat the connector. -
Page 24: Figure 2-2. Front Status Leds
Starting the Enclosure 2–5 NOTE: There are two different drive displays for a properly functioning disk. CXO6919A Figure 2–2. Front Status LEDs CXO6982A Figure 2–3. Rear Status LEDs... -
Page 25: I/O Module
Chapter I/O Module This chapter discusses the operation and function of the LVD disk enclosure I/O module (the “module”). Each enclosure requires an I/O module for operation with a wide (16-bit) controller SCSI bus. The module is the CRU that connects the enclosure to the host controller through a 68-pin, VHDCI connector and a SCSI bus cable. -
Page 26: Module Power Protection
3–2 Enclosure 4200 Family LVD Disk Enclosures User Guide Figure 3–1. Single-Bus I/O Module Module Power Protection A sensor on the +5 VDC line in the module detects overcurrent conditions. Should this error occur, the sensor disconnects the voltage from the module and the power LED is O (see Figure 3–2). -
Page 27: Scsi Bus Connectors
SCSI Bus Connectors The 68-pin VHDCI connector enables you to configure the enclosure as single-bus, single initiator subsystem. SCSI Bus Termination A SCSI bus is defined by two bus terminators. The external bus has terminators on the controller and on the module. Each internal bus has a terminator on the module and on the backplane. -
Page 28: Scsi Address Map
3–4 Enclosure 4200 Family LVD Disk Enclosures User Guide Table 3–1 Single-Bus Module LED Displays LEDs Terminator enabled (LED O Module power present (LED O Terminator enabled (LED O EMU locating module (LED F No module power Module nonoperational SCSI Address Map The module assigns a SCSI address to each drive bay in the enclosure using a SCSI address map. -
Page 29: 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 (see Figure 4–2). CAUTION: Controlling airflow within the enclosure requires installing a disk drive or a drive blank in each drive bay. -
Page 30: Status Reporting
4–2 Enclosure 4200 Family LVD Disk Enclosures User Guide Status Reporting The three disk drive status LEDs (see Figure 4–2) define the operational status of each drive. To determine the drive status you must observe all three LEDs (see Table 4–1). - Page 31 Table 4–1 Disk LED Status Displays (Continued) LEDs Operational Status (Continued) Drive not being accessed Drive is being rebuilt or Array Capacity expansion in progress Drive Operational O NOT REPLACE DRIVE Drive not being accessed Drive configured as part of an array Drive Operational O NOT REPLACE DRIVE Drive selected using the Array Configuration Utility.
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Page 32: Drive Power
4–4 Enclosure 4200 Family LVD Disk Enclosures User Guide Drive Power Backplane overcurrent sensors monitor the +5 VDC and +12VDC drive voltages. When there is a drive overcurrent condition the sensor disconnects the voltage from the drive. This disables the drive, ensuring that no data is written to it. The drive is disabled until one of the following conditions occurs: The defective drive is replaced. -
Page 33: Replacing A Disk
NOTE: Removing a drive from the enclosure affects the airflow 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 34: Enclosure Power And Cooling
Enclosure Power and Cooling This chapter describes the function and general operation of the enclosure power supply and fans. See Figure 5–1 for major component locations. Figure 5–1. Power Supply and Fan Assembly Components Chapter Power Supply Element AC Input Connector Module Latch Status LED Fan Tabs... -
Page 35: Enclosure Power
EMU, and I/O module. A single power supply, the standard configuration, supports sequential drive spin-up. The Compaq recommended dual power supply configuration can support simultaneous drive spin-up. The power supply circuitry provides protection against:... -
Page 36: Temperature Sensing
The fan mounting assembly is the element for mounting the second fan. This element has no power circuitry. It does contain a circuit board for processing signals to and from the fan. Temperature Sensing The power supply temperature sensor provides a temperature range signal to the EMU. The EMU can use this signal to set the fan speed. -
Page 37: Status Reporting
5–4 Enclosure 4200 Family LVD Disk Enclosures User Guide Status Reporting The green status LED on the fan displays the status of either the power supply or the fan. See Table 5–1 for definitions of the LED displays. Table 5–1 Power Supply and Fan Status Displays Both the power supply and the fan are operational. -
Page 38: Replacing Crus
Each replacement CRU kit contains detailed replacement instructions. This chapter describes the general replacement procedures. Ordering a Spare CRU Ordering a replacement CRU requires the Compaq spare part number. This number is located in the upper-right corner of the product label (see , Figure 6–1). -
Page 39: Esd Protection
6–2 Enclosure 4200 Family LVD Disk Enclosures User Guide ESD Protection When you replace a CRU, you must take precautions to prevent the possibility of electrostatic discharge (ESD) damaging sensitive electronic items. 1. Always transport and store CRUs in a static-safe container. - Page 40 EMU, and I/O module. This reduces the enclosure weight to approximately 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.
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Page 41: Replacing A Drive With A Drive Blank
NOTE: Removing a drive from the enclosure affects the airflow 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 Press in on the Ejector Button Pull out on the drive until it is disconnected from the backplane connector. - Page 42 Table 6–2 Installing a Drive Blank (Continued) Insert the drive blank part-way into the enclosure. Firmly press in on the drive bank to seat it in the connector. Replacing CRUs 6–5 CXO6824A...
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Page 43: Appendix A 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 44: Country-Specific Certifications
Enclosure 4200 Family LVD Disk Enclosures 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 45: Appendix B Specifications
Physical Specifications CAUTION: The weight of the disk enclosure with the elements installed 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. Figure B–1 and Figure B–2 show the dimensions for vertical and horizontal orientations. -
Page 46: Figure B-1. Dimensions-Vertical Orientation
B–2 Enclosure 4200 Family LVD Disk Enclosures User Guide CXO6965A Figure B–1. Dimensions–Vertical Orientation CXO6898A Figure B–2. Dimensions–Horizontal Orientation... -
Page 47: Table B-1 14-Disk Enclosure Physical Specification
Table B–1 14-Disk Enclosure Physical Specification Horizontal Orientation (see Figure B–1) Empty 5.16 in (13.1 cm) 17.625 in (44.8 cm) 19.875 in (50.5cm) Weight 24 lb (11 kg) Table B–2 Element Physical Specifications Vertical Orientation (see Figure B–2) 4.5 in (11.4 cm) 9.5 in (24.1 cm) 1.375 in (3.5 cm) Weight... -
Page 48: Table B-3 Operating Specifications
Air Quality: Not to exceed a maximum of 500,000 particles, 0.5 micron or larger, per cubic foot of air. Heat Dissipation: 1600 BTUs per hour When shipping this product, or placing it in short term storage, Compaq recommends maintaining the environmental conditions listed in Table B–4. -
Page 49: Table B-5 Ac And Dc Power Specifications
Power Specifications Table B–5 defines the AC and DC power specifications for the disk enclosure power supplies. Table B–5 AC and DC Power Specifications Frequency (± 5 %) Voltage ( ± 1 0%) Power Initial Voltage Steady State Current Initial Voltage Steady State Current Initial Voltage Steady State Current... - Page 50 SCSI bus. Connectors, expanders, and hubs do not use a SCSI bus ID. See also nodes. disk enclosure A Compaq enclosure dedicated to supporting disk drives. Such an enclosure includes the power supplies, fans, I/O modules, and an EMU. Glossary...
- Page 51 GL–2 Enclosure 4200 Family LVD Disk Enclosures User Guide 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 passive drive blank is to control airflow within the disk enclosure.
- Page 52 pluggable A method of element replacement whereby the complete system remains on-line during element removal or insertion. There is no data transfers over the enclosure buses during removal or insertion of an element (the bus is “quiesced”). No booting or loading of code is permitted except on the element being inserted.
- Page 53 StorageWorks The Compaq set of enclosure products that allows customers to design and configure their own storage subsystem. Elements include power, packaging, and interconnections in a StorageWorks enclosure. Storage devices, power supplies, I/O modules, EMUs, and array controllers may be integrated therein to form storage subsystems.
- Page 54 airflow 1–2 4–5 6–4 backplane 1–2 bays, See enclosure CRUs ordering 6–1 replacement procedures 6–2 replacing 6–1 data integrity 1–3 data transfers 1–3 disk drive blank 1–6 detecting installation 1–4 detecting removal 1–4 disk drives 1–2 1–6 4–1 DC power 5–2 drive blank 4–4 installing 1–4 overcurrent sensors 4–4...
- Page 55 I–2 Enclosure 4200 Family LVD Disk Enclosures User Guide rear view 1–2 safety precautions 6–3 weight 6–3 environmental monitoring unit. See EMU. environmental specifications B–4 operating B–4 shipping B–4 storage B–4 fans 1–2 1–6 5–1 5–3 DC power 5–2 detecting installation 1–4 detecting removal 1–4...
- Page 56 detecting installation 1–4 detecting removal 1–4 diagnostic information 5–2 fan interface 5–3 module latch 5–1 power ratings 5–2 protection 5–2 replacing 5–4 status LED 5–1 5–4 LED display 5–4 reporting 5–2 5–4 temperature sensing 5–3 product certification A–2 quiescing 1–6 replacement affect on SCSI bus operation 1–6 methods 1–6...