Enclosure 4200 Family LVD Disk Enclosures User Guide First Edition (July 1999) Part Number: EK–SW2ZS–UG.
Notice 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.
Contents About This Guide Chapter 1 Introducing the Enclosure Disk Enclosure Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCSI Buses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Variable Speed Fans . . . . . . . . . . . . . .
iv Enclosure 4200 Family LVD Disk Enclosures Users Guide Single-Bus Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2 SCSI Bus Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3 SCSI Bus Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3 Status Displays . . . . . . . . . . . . . . .
Contents v Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–4 Power Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Figures Figure 1–1. Disk Enclosure (Front View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 1–2. Disk Enclosure (Rear View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 1–3. Front Mounted Elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 1–4. Rear Mounted Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Tables Table 1 Documentation Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi ii Table 2 Related Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv Table 1–1 CRU Replacement Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6 Table 2–1 SCSI Bus Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
xii 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. Chapter 6, “Replacing CRUs” This chapter describes the procedures for replacing customer replaceable units (CRUs). Appendix A, “Regulatory Notices” This appendix defines the country-specific regulatory standards for this product.
xiii Documentation Conventions The documentation conventions used in this publication are shown in Table 1. Table 1 Documentation Conventions Symbol Boldface type italic type Description Boldface type indicates the first instance of terms being defined in the text, the glossary, or both. Italic type indicates one of the following: ■ Emphasis ■ A publication title ■ A glossary cross-reference to another glossary entry.
xiv Enclosure 4200 Family LVD Disk Enclosures Users Guide Table 1 Documentation Conventions (Continued) Symbol Description I/O module LED label Power Status (ON) or EMU Locate (FLASHING) LED (green) I/O module label Ultra2 SCSI, Single Bus, LVD input connector Light emitting diode (LED) is OFF. LED is FLASHING. LED is ON.
xv Related Documents Table 2 lists publications that contain additional information relevant to the LVD disk enclosure products.
Chapter 1 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. CXO6854A Figure 1–1.
1–2 Enclosure 4200 Family LVD Disk Enclosures User Guide CXO6912A 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). A rack (cabinet) mounted enclosure requires a RETMA 3U vertical opening (5.25-inches) where a “U” is 1.75-inches.
Introducing the Enclosure 1–3 SCSI Buses The enclosure supports only Wide-Ultra2 SCSI, wide (16-bit), internal LVD buses. Depending on the host interface, the external SCSI bus, the bus from the I/O module to the host can be either 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.
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 ■ Detecting the installation of a fan, power supply, drive, or I/O module ■ Detecting the removal of a fan, power supply, drive, or I/O module ■ Sensing enclosure temperatures ■ Sensing power supply voltage, curr
Introducing the Enclosure 1 3 2 5 4 6 7 8 9 10 11 12 1–5 13 14 15 CXO6728A 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). 1 2 3 4 5 6 CXO6979A 1 2 3 EMU Fan 1 Power Supply Bay 1, or Fan Mounting Assembly1 4 5 6 Fan 2 Power Supply Bay 2 I/O Module 1. In a single power supply configuration, the fan mounts on the fan mounting assembly. Figure 1–4.
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 Element Functions A full description of the individual elements and their functions can be found in the individual chapters. Element Replacement The methods used to replace an element depend upon several factors.
Introducing the Enclosure Table 1–1 CRU Replacement Methods (Continued) Element Method Fan Hot-pluggable I/O Module Hot-pluggable Power Supply–Dual Hot-pluggable Power Supply–Single SCSI Bus Cables No Power Applied1 Pluggable 1. In a single power supply configuration, the enclosure is disabled when the power supply fails.
Chapter 2 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. All I/O modules has 68-pin, very high density computer interface (VHDCI) connectors. Figure 2–1 shows the cable connectors for a single bus configuration.
2–2 Enclosure 4200 Family LVD Disk Enclosures User Guide 1 CXO6980A 1 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. Table 2–1 SCSI Bus Cables Length Description 68-conductor SCSI cable with 2 Vertical Offset VHDCI straight plug connectors with jack screws Meters Feet Part Number 1.8 3.7 11.
Starting the Enclosure 2–3 Table 2–1 SCSI Bus Cables (Continued) Length Description Meters Feet Part Number 68-conductor SCSI cable with 1 High-Density straight plug connector with jack screws 1 Vertical Offset VHDCI straight plug connector with jack screws 1.8 3.7 6 12 110941-001 110941-0021 CXO6955A 1. One cable provided with each enclosure. 2. Use only with Ultra2 SCSI LVD bus operating at speeds of 80 Mb/sec or less.
2–4 Enclosure 4200 Family LVD Disk Enclosures User Guide Table 2–2 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. CXO6981A 3. Firmly seat the cable connector on the module connector. 4. Finger tighten the thumbscrews to fully seat the connector. 5. Restart data transfers over the SCSI bus. Applying Power There are no disk enclosure power control switches.
Starting the Enclosure NOTE: There are two different drive displays for a properly functioning disk. CXO6919A Figure 2–2. Front Status LEDs CXO6982A Figure 2–3.
Chapter 3 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. This module can support a maximum of 14 drives in a single enclosure or on a single-bus.
3–2 Enclosure 4200 Family LVD Disk Enclosures User Guide CXO6981A 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 OFF (see Figure 3–2). This disables the module until one of the following conditions occurs: ■ The overcurrent condition no longer exists. ■ The defective module is replaced.
I/O Module 3–3 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. The module connects the external bus and the internal bus together.
3–4 Enclosure 4200 Family LVD Disk Enclosures User Guide Table 3–1 Single-Bus Module LED Displays LEDs Definition Operational Status LED Displays Terminator enabled (LED ON) Module power present (LED ON) Terminator enabled (LED ON) EMU locating module (LED FLASHING) Nonoperational Status LED Display 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.
Chapter 4 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.
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). Drive Activity LED This green LED indicates the drive activity, that is drive being accessed, spinning-up, and so forth.
Disk Drives Table 4–1 Disk LED Status Displays (Continued) LEDs Status Operational Status (Continued) Drive not being accessed Drive is being rebuilt or Array Capacity expansion in progress Drive Operational DO NOT REPLACE DRIVE Drive not being accessed Drive configured as part of an array Drive Operational DO NOT REPLACE DRIVE Drive selected using the Array Configuration Utility. DO NOT REPLACE DRIVE Drive is being accessed or spinning-up.
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. ■ The overcurrent condition no longer exists.
Disk Drives Replacing a Disk Replacing a disk requires you to order a replacement using the spare part number (see Chapter 6, “Replacing CRUs”). The disk replacement kit contains detailed replacement instructions. CAUTION: Removing more than one disk drive at a time can cause the enclosure to overheat. Never remove more than one disk drive at a time. NOTE: Removing a drive from the enclosure affects the airflow in the enclosure.
Chapter 5 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. 1 6 5 2 3 4 5 CXO6809A Figure 5–1.
5–2 Enclosure 4200 Family LVD Disk Enclosures User Guide Enclosure Power The power supply and fan 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 ± 5% (90 to 264 VAC, 47 to 63 Hz). There are three DC outputs: ■ +5 VDC for the EMU, I/O module, backplane, and drives ■ +12.3 VDC for the drives. ■ +12.5 VDC for the fans. The nominal output of each supply is 377W, with a peak output of 425W.
Enclosure Power and Cooling 5–3 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. Fan Interface The fan mounts on the rear of the power supply. A power supply connector is the interface between the fan and the enclosure.
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 LED Status Operational Status Both the power supply and the fan are operational. The EMU is locating either the power supply or the fan. Nonoperational Status Either the power supply or the fan is nonoperational.
Chapter 6 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 , Figure 6–1). located in the upper-right corner of the product label (see 1 1 CXO6879A Figure 6–1. Typical Product Label The first six characters of the part number identify the CRU. The last three define the revision level.
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. 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.
Replacing CRUs CAUTION: An assembled enclosure (all elements installed) weighs more than 65 lb (29.5 kg). Moving the assembled enclosure requires a minimum of two individuals. To safely and easily install the enclosure requires removing the drives, power supply and fans, 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.
6–4 Enclosure 4200 Family LVD Disk Enclosures User Guide Replacing a Drive with a Drive Blank Should a disk drive fail you may wish to replace it with a drive blank using the procedure in Table 6–2. CAUTION: Removing more than one disk drive at a time can cause the enclosure to overheat. Never remove more than one disk drive at a time. 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.
Replacing CRUs Table 6–2 Installing a Drive Blank (Continued) 4. Insert the drive blank part-way into the enclosure. CXO6824A 5. Firmly press in on the drive bank to seat it in the connector.
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.
A–2 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. NOTE: Elements without an individual product certification label are qualified as part of the next higher assembly (for example, enclosure, rack, or tower).
Appendix B Specifications This appendix defines the physical, environmental, and power specifications and the environmental specifications of the disk enclosure and the elements. 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.
B–2 Enclosure 4200 Family LVD Disk Enclosures User Guide 1 2 3 CXO6965A Figure B–1. Dimensions–Vertical Orientation 1 2 3 CXO6898A Figure B–2.
Specifications B–3 Table B–1 14-Disk Enclosure Physical Specification Horizontal Orientation (see Figure B–1) Vertical Orientation (see Figure B–2) Empty Installed Shipping Carton Shipping Carton and Pallet 1 2 3 5.16 in (13.1 cm) 5.16 in (13.1 cm) 25.25 in (64.1 cm) 30.25 in (76.8 cm) 17.625 in (44.8 cm) 17.625 in (44.8 cm) 23.5 in (59.7cm) 40.0 in (101.6 cm) 19.875 in (50.5cm) 19.875 in (50.5cm 12.5 in (31.
B–4 Enclosure 4200 Family LVD Disk Enclosures User Guide Table B–2 Element Physical Specifications (Continued) 1 2 3 Weight Vertical Orientation (see Figure B–2) Horizontal Orientation (see Figure B–1) Installed Shipping Carton Power Supply (without fan) 4.5 in (12.7 cm) 11.5 in (29.2 cm) 9.5 in (24.1 cm) 16.75 in (42.6 cm) 6.25 in (15.9 cm) 13.0 in (33.0 cm) 4.0 lb (1.8 kg) 6.0 lb (2.
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 AC Power Specifications Range Minimum Nominal Maximum Frequency (±5%) 47 Hz 50 to 60 Hz 63 Hz Voltage (±10%) 90 VAC 100 to 240 VAC 264 VAC 377 W 475 W +5.15 VDC 5.20 VDC 20.0 A 28.0 A 12.25 VDC 12.37 VDC 20.0 A 31.5 A 12.50 VDC 12.75 VDC DC Power Specifications Power +5 VDC Initial Voltage 5.
Glossary The terms in this glossary are either unique to the disk enclosure, or are common StorageWorks terms. ambient temperature The air temperature in an area where a system is installed. Also referred to as rack or enclosure intake air temperature. bay The physical location of a drive in an enclosure. Each bay is numbered to define its location. The bay number may or may not be the same as the SCSI bus ID. carrier The container in which storage devices are mounted to form CRUs.
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. dual power See redundant power configuration. element An object in an enclosure such as an EMU, power supply, disk, fan, I/O module, and so forth.
Glossary GL–3 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. User applications that are not dependent upon the elements on the affected SCSI bus are not noticeably impacted. See also hot-pluggable.
GL–4 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. The valid address range for a wide bus is 0 through 15.
Index A sequential 5–2 simultaneous 5–2 status 4–2 status LEDs 4–2 displays 4–2 drive activity 4–2 drive failure 4–2 on-line 4–2 airflow 1–2, 4–5, 6–4 B backplane 1–2 bays, See enclosure C CRUs ordering 6–1 replacement procedures 6–2 replacing 6–1 D 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 power 4–4 replacing 4–5 spin-up E electromagnetic int
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.
Index 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 Q quiescing 1–6 R replacement affect on SCSI bus operation 1–6 methods 1–6 disk drive 1–6 dual power supplies 1–7 EMU 1–6 fan 1–7 hot-pluggable 1–6 I/O module 1–7 pluggable 1–6, 1–7 SCSI bus cables 1–7 single power supply 1–7 S safety 1–6
