Compaq StorageWorks™ RAID Array 3000 Pedestal Storage Subsystem Hardware Users Guide Third Edition (January 2001) Part Number EK-SMCPO-UG.
© 2001 Compaq Computer Corporation. COMPAQ, the Compaq logo and StorageWorks Registered with the U.S. Patent and Trademark Office. Microsoft, MS-DOS, Windows, and Windows NT are trademarks of Microsoft Corporation. All other product names mentioned herein may be trademarks of their respective companies. Confidential computer software. Valid license from Compaq required for possession, use or copying. Consistent with FAR 12.211 and 12.
Contents About This Guide Purpose and Scope .......................................................................................................ix Intended Audience .......................................................................................................ix Document Structure .....................................................................................................ix Related Documents ................................................................................................
iv RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide Chapter 2 RAID Array Controller Controller Overview ..................................................................................................2-1 Controller Features ....................................................................................................2-3 Controller Reset and LED Indicators ........................................................................2-8 Flexible RAID Set Configuration....................
Contents Chapter 4 Expansion Pedestal Option Product Description .................................................................................................. 4-1 Expansion Pedestal Cabinet...................................................................................... 4-2 Expansion Pedestal Components.............................................................................. 4-4 Reconfiguring Base Pedestal UltraSCSI Bus ...........................................................
vi RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide Figure 2-4. RAID 0 write .......................................................................................2-15 Figure 2-5. Diagram of a RAID 1 write .................................................................2-16 Figure 2-6. Diagram of RAID 0+1 write................................................................2-17 Figure 2-7. Diagram of a RAID 4 write .................................................................
Contents List of Tables Table 1 Related Documents.........................................................................................xi Table 1-1 RAID Array 3000 Pedestal Part Numbers and Model Descriptions .............................................................................................. 1-3 Table 1-2 Single Host, Single Adapter Cabling ..................................................... 1-15 Table 1-3 Single Host, Dual Adapter/Dual Controller Cabling .............................
About This Guide Purpose and Scope This guide is designed to for installers and operators of Compaq TM StorageWorks RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide. Intended Audience This document is written for installers and operators.
x RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide Chapter 2: RAID Array Controller n Controller Overview n Controller Features n Controller Reset and LED Indicators n Flexible RAID Set Configuration n Performance Enhancements n RAID Levels Supported n Redundant Operation n Environmental Chapter 3: Maintenance n Pedestal Status and Power LEDs n SBB Status LEDs n Controller LEDs n EMU Error Reporting n Replacing Components (FRUs) n Differential/Wide UltraSCSI Bus
Contents Related Documents In addition to this guide, the following documentation is useful to the reader: Table 1 Related Documents Document Title Part Number RAID Array 3000 Subsystem Second Controller Option Installation Guide EK-SM3KC-IG.E01 RAID Array 3000 Controller Shelf Hardware Users Guide EK-SMCPQ-UG.D01 Command Console V2.
xii RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide Text Conventions This document uses the following conventions to distinguish elements of text: Keys Keys appear in boldface. A plus sign (+) between two keys indicates that they should be pressed simultaneously. USER INPUT User input appears in a different typeface and in uppercase. FILENAMES File names appear in uppercase italics. Menu Options, Command Names, Dialog Box Names These elements appear in initial capital letters.
Contents Symbols in Text The following symbols are found in the text of this guide to indicate different types of information. WARNING: Text set off in this manner indicates that failure to follow directions in the warning could result in bodily harm or loss of life. CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of information. IMPORTANT: Text set off in this manner presents clarifying information or specific instructions.
xiv RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide This is a test This symbol on an RJ-45 receptacle indicates a Network Interface Connection. WARNING: To reduce the risk of electric shock, fire, or damage to the equipment, do not plug telephone or telecommunications connectors into this receptacle. This symbol indicates the presence of a hot surface or hot component. If this surface is contacted, the potential for injury exists.
Contents Rack Stability WARNING: To reduce the risk of personal injury or damage to the equipment, be sure that: n The leveling jacks are extended to the floor. n The full weight of the rack rests on the leveling jacks. n The stabilizing feet are attached to the rack if it is a single rack installation. n The racks are coupled together in multiple rack installations. n Only one component is extended at a time. A rack may become unstable if more than one component is extended for any reason.
xvi RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide Be sure to have the following information available before you call Compaq: n Technical support registration number (if applicable) n Product serial number n Product model name and number n Applicable error messages n Add-on boards or hardware n Third-party hardware or software n Operating system type and revision level Compaq Website The Compaq website has information on this product. Access the Compaq website: http://www.
Chapter 1 Product Overview This chapter provides an overall description of the RAID Array 3000 Storage System and its components. Examples of Host/Storage System connections and a list of technical and environmental specifications are included at the end of the chapter. NOTE: This guide is the Hardware User’s Guide. For configuration information, refer to the Getting Started RAID Array 3000 Installation Guide for your Host system and the Command Console V2.
1-2 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide The RAID Array 3000 offering also includes option kits designed to increase the storage capacity and enhance the performance of the subsystem. The first is an expansion pedestal (second enclosure) designed to increase the storage capacity of the subsystem to a maximum of 14 drives. The pedestal expansion kit option is described in detailed in Chapter 4 “Expansion Pedestal Option” of this guide.
Product Overview 1-3 The RAID Array 3000 pedestal is equipped with a dual-channel RAID controller that supports all of the UltraSCSI bus features. It also contains an Environmental Monitor Unit (EMU) board for environmental monitoring and error detection. Table 1-1 RAID Array 3000 Pedestal Part Numbers and Model Descriptions Compaq Part No. DS-SWXRA-GA Item Description RA3000 pedestal subsystem with one controller, 120 V.
1-4 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Pedestal Features The major features of the pedestal are: ■ Two differential 16-bit UltraSCSI host buses ■ Seven 3½-in disk drive SBB slots ■ One dual-channel RAID array controller ■ Second controller option for redundancy ■ Expansion pedestal option allowing up to fourteen SBB slots in a dualpedestal subsystem configuration ■ Memory cache expansion option for the controller ■ Redundant power provided by two fan-cooled univer
Product Overview 1-5 ■ The pedestal is equipped with an internal configuration switch, which sets the SCSI ID addresses of the controller and the storage devices. Figure 1-2. Pedestal front panel major components Figure 1-3.
1-6 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Pedestal Components The major components in the pedestal subsystem include: ■ Dual-channel RAID array controller ■ Two 16-bit single-ended split SCSI buses ■ Environmental Monitor Unit (EMU) ■ Two universal 50/60 Hz, 120 or 240 VAC power supplies ■ Separate free-standing backup power supply (UPS) StorageWorks Building Blocks (SBBs) The pedestal has seven 3½-in disk drive SBB slots.
Product Overview 1-7 ■ 32 Logical Unit (LUNs) per host channel (some operating systems may be limited to 8) ■ Support for Hot and Warm spare disks ■ UPS-backed write caching ■ Per LUN write cache/write back selection ■ Configuration/Maintenance via RS-232 or host SCSI channel using StorageWorks Command Console (SWCC) ■ Update of firmware via host channel Pedestal Power Supplies The pedestal has two interchangeable, air-cooled, AC power supply modules located at the rear of the unit.
1-8 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide The UPS has its own installation, operation, and service manual. The manual describes the UPS in detail and is part of the documentation set enclosed with your subsystem. Environmental Monitor Unit (EMU) The EMU is an internal circuit board that monitors the operation of the pedestal.
Product Overview 1-9 Figure 1-5 shows the Pedestal rear panel components. Host #0 External Fault Host #1 UPS Controller (Top) Controller (Bottom) 3000-23A Figure 1-5.
1-10 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide UltraSCSI Buses The pedestal contains two, 16-bit, single-ended, wide UltraSCSI buses (factory-configured as a split bus) that connects the controllers to the disk drives. The split-bus arrangement is divided into two-bus paths designated device port 0 and device port 1 as shown in Figure 1–6.
Product Overview 1-11 The subsystem can be reconfigured for through-bus operation by modifying the bus and resetting the internal configuration switch. The information needed to reconfigure the bus from split-bus to a through-bus configuration is described in Chapter 4 “Expansion Pedestal Option”. 6 3000-38 Figure 1-7. UltraSCSI bus configuration switch Controller SLOT 0 ID = 8 SLOT 1 Device Port 0 SLOT 2 SLOT 3 11 SLOT 4 8 Device Port 1 SLOT 5 SLOT 6 ID = 10 3000-52 Figure 1-8.
1-12 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Connecting the Pedestal to a Host System This section illustrates how to connect four possible RA3000/Host configurations.
Product Overview 1-13 Figure 1-9 shows the Single host, Single Adapter Cabling diagram. Rear View of DS-SWXRA-GA Controller Pedestal Rear View of DS-SWXRA-GD Expansion Pedestal 1 2 3 Host System Host Adapter 6 4 5 shr-1311b Figure 1-9.
1-14 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Figure 1-10 shows the Single host, Dual Adapter/dual Controller Cabling diagram. Rear View Rear ViewofofDS-SWXRA-GA DS-SWXRA-GA Controller Pedestal Controller Pedestal 1 Rear View Rear View of of DS-SWXRA-GD DS-SWXRA-GD Expansion Pedestal Expansion Pedestal 2 3 Host System Host Adapter Host Adapter 5 6 4 shr-1312b Figure 1-10.
Product Overview 1-15 Figure 1-11 shows the Single Host, Single Adapter/dual Controller (y-cable connection) Cabling diagram. Rear View of DS-SWXRA-GA Controller Pedestal Rear View of DS-SWXRA-GD Expansion Pedestal Host System Host Adapter shr-1313b Figure 1-11.
1-16 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Figure 1-12 shows the Dual host, Single Adapter/single Controller Cabling diagram. Rear View of DS-SWXRA-GA Rear View of DS-SWXRA-GA Controller Pedestal Controller Pedestal Rear of Rear ViewView of DS-SWXRA-GD DS-SWXRA-GD Expansion Pedestal Expansion Pedestal Host System Host Adapter Host System Host Adapter shr-1314b Figure 1-12.
Product Overview 1-17 Specifications Table 1-6 Pedestal Technical Specifications Item Description Cabinet Pedestal with seven (7) disk SBB slots Expansion pedestal with an additional 7 slots Controller HSZ22 Controller cache 16 MB standard upgrades to 128 MB for a two controller pair Backup for cache Standard UPS Mirrored write-back cache Yes Device channels per controller 2 Maximum disks per device port 14 Dual active controllers Yes, order HSZ22-AA and second solutions software kit Host
1-18 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Table 1-7 Pedestal Physical and Power Specification Physical Specifications Item Dimension Height 564 mm Width 254 mm Depth 494 mm Rear clearance (air exhaust) 305 mm Front clearance (door opening) 305 mm Weight (no devices) 19.
Chapter 2 RAID Array Controller This chapter describes the major features and characteristics of the RAID array controller in the RAID Array 3000 subsystem. The number of devices supported by the controller may be limited by the enclosure. Controller Overview The RAID Array controller provides high performance, high-availability access to SCSI disk array subsystems along a UltraSCSI/Wide SCSI bus.
2-2 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide The controller has two Single Inline Memory Module (SIMM) connectors for up to 64 MB of cache memory. The SIMM connectors form a mirrored pair when the controllers are configured in a redundant controller configuration; otherwise they are fully accessible by the controller.
RAID Array Controller 2-3 Controller Features The controller is the intelligent bridge between the host and the devices in the pedestal. From the host’s perspective, the controller is simply another SCSI device connected to one of its I/O buses. Consequently, the host sends its I/O requests to the controller just as it would to any other SCSI device. Figure 2–1 shows the role of the controller between the host and the pedestal. Figure 2-1.
2-4 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide From the pedestal’s perspective, the controller receives the I/O requests from the host and directs them to the devices in the pedestal. Since the controller processes all the I/O requests, it eliminates the host-based processing that is typically associated with reading and writing data to multiple storage devices.
RAID Array Controller 2-5 ■ Stripesets (RAID 0) combine disk drives in serial to increase transfer or requests rates ■ Mirrorsets (RAID 1) combine disk drives in parallel to provide a highly reliable storage unit ■ RAID 4 provides striping with a fixed parity drive ■ RAIDsets (RAID 5) combine disk drives in serial— just like stripesets — but also store parity data to ensure high reliability ■ Stripe mirrorsets (RAID 0 + 1) combine mirrorsets in serial to provide the highest throughput and availabi
2-6 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Table 2-1 Controller Specifications continued Item Specifications Disk warm spare (not spinning) Yes, global warm spare Redundant power supplies Yes Redundant controllers Yes Controller failover Yes, automatic Controller hot spare Yes (Active/Passive mode) Controller hot plug Yes Cluster support Yes, single (SCSI) bus cluster Maximum number of units presented to host 64 Maximum host port transfer speed 20 MHz Command q
RAID Array Controller 2-7 Table 2-1 Controller Specifications continued Item Specifications Environmental Temperature 41ºF to 122ºF (5ºC to 50ºC) operating, -40ºF to 140ºF (-40ºC to +60ºC) non-operating Relative humidity 10% to 95% non-condensing (operating), 5% to 90%, non-condensing (non-operating) Physical size 8.55 in (21.7 cm) deep, 5.03 in wide, 1.
2-8 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Figure 2-3 shows the front panel of the controller. Figure 2-3. Controller front panel Flexible RAID Set Configuration In addition to its flexible hardware design, the controller’s firmware offers the user the flexibility to configure RAID sets in several different ways: ■ RAID sets can comprise drives from any drive channel and SCSI ID.
RAID Array Controller 2-9 ■ Each RAID set can be partitioned into smaller redundancy groups. ■ The controller’s host LUN Mapping feature makes it possible to map RAID sets differently to each host port. You make the same redundancy group appear on different LUNs to different hosts, or make a redundancy group visible to one host but not to another. ■ Any drive may be designated as a hot or warm spare.
2-10 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Efficient Write and Read Algorithms Standard RAID write operations that involve parity, such as those in RAID levels 4 and 5, require multiple, time-consuming steps: 1. Read data from the parity drive. 2. Read existing data from the target data drives. 3. Exclusive-or the old parity, old data, and new data to generate new parity data. 4. Write the new parity data to the parity drive. 5. Write the new data to the target data drives.
RAID Array Controller 2-11 Write Gathering The controller will attempt to consolidate multiple writes destined for contiguous blocks and then write the entire data block in one operation. The controller stores the data in cache until it performs the write. Ideally, the controller will wait until it has gathered enough data to fill an entire stripe. This action enables the controller to avoid reading from the parity and data drives before making the write.
2-12 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide RAID Levels Supported The RAID Array 3000 controller supports the following RAID levels: Table 2-3 RAID Levels Supported RAID Level Description 0 Striping without parity 1 Mirroring 0+1 Striping and mirroring 4 Striping with fixed parity drive 5 Striping with floating parity drive JBOD Just a Bunch of Drives NOTE: The controller stripes data in multi-block chunk sizes.
RAID Array Controller 2-13 RAID 0 RAID 0 breaks up data into smaller chunks and writes each chunk to a different drive in the array. The size of each chunk is determined by the controller’s chunk size parameter, which you set in the course of creating a RAID set. The advantage of RAID 0 is its high bandwidth. By breaking up a large block of data into smaller chunks, the controller can use multiple drive channels to write the chunks to the disk drives.
2-14 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Figure 2–4 shows a diagram of a RAID 0 write. Figure 2-4.
RAID Array Controller 2-15 RAID 1 RAID 1 (also known as mirroring or shadowing) takes data sent by the host and duplicates it on all the drives in an array. The result is a high degree of data availability, since you can lose all but one drive in the array and still have full access to your data. This high degree of data availability comes at a price: a RAID 1 array requires multiple drives to achieve the storage capacity of a single drive. Figure 2–5 shows a RAID 1 write. Figure 2-5.
2-16 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Figure 2-6 shows a diagram of RAID 0+1 write. Figure 2-6. Diagram of RAID 0+1 write In the event of a drive failure, a RAID 0+1 array will enter degraded mode and continue to operate by substituting the failed drive with its mirror. When the controller creates a RAID 0+1 set, it first sorts the drives by channel number and SCSI ID.
RAID Array Controller 2-17 RAID 4 RAID 4 breaks up host data into chunks, calculates parity by performing an exclusive-or on the chunks, and then writes the chunks to all but one drive in the array and the parity data to the last drive. When the host requests data from the disk drives, the controller retrieves the chunks containing the addressed data, reconstitutes the data from the chunks, and passes the data to the host. Figure 2-7.
2-18 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide In general, RAID 4 is best suited for applications such as graphics, imaging, or video that call for reading and writing large, sequential blocks of data. However, you may find that RAID 4 is preferable to RAID 5 even for applications characterized by many small I/O operations, such as transaction processing.
RAID Array Controller 2-19 RAID 5 RAID 5 addresses the bottleneck issue for barrages of widely scattered, small I/O operations. Like RAID 4, RAID 5 breaks up data into chunks, calculates parity, and then writes the chunks in stripes to the disk drives; saving one drive one each stripe for the parity data. Unlike RAID 4, however, RAID 5 changes the parity drive on each stripe.
2-20 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide While RAID 5 is ideally suited for applications with many, small I/O operations, there is no reason why it cannot function equally well for applications with large, sequential I/O operations. This makes RAID 5 an excellent all-purpose RAID level. CAUTION: RAID 5 can withstand a single failure and handle I/O activity without interruption in degraded mode until the failed drive is rebuilt.
RAID Array Controller 2-21 Initialization During initialization, the firmware in the RAID 3000 verifies that both controllers have consistent configurations including identical memory cache and system parameters. If the controller setups are incompatible, the set is not bound and each controller operates in stand-alone mode. Message Passing Information is shared between the two controllers by a collection of messages passed through the backplane connectors.
2-22 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Backup Power Management The controller must be connected to a backup battery and/or UPS to prevent the subsystem cache from being corrupted during unexpected losses of power. If no backup power supply is provided, the controller will remain off line and reject all I/O requests with a status of Check Condition/Hardware Error.
RAID Array Controller 2-23 Voltage Monitoring System Voltage The controller monitors the incoming system voltage levels and ensures that they are satisfactory for controller operation. The acceptable voltage levels are listed in Table 2–7. Table 2-7 Acceptable System Voltage Levels State Range Action Normal 4.80 to 5.25 V Normal operation Low warning 4.75 to 4.80 V Alarm High warning 5.25 to 5.30 V Alarm Low severe Less than 4.75 V Off line High severe Greater than 5.
2-24 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide 12 V Supply Voltage The controller monitors the incoming 12-volt levels and ensures that they are satisfactory for operation. The acceptable voltage levels are listed in Table 2–9. Table 2-9 Acceptable 12 Volt Levels State Range Action Normal 10.80 to 13.80 V Normal operation Low warning 10.20 to 10.80 V Alarm High warning 13.80 to 14.40 V Alarm Low severe Less than 10.20 V Off line High severe Greater than 14.
RAID Array Controller 2-25 Board Temperature The controller monitors the on-board operating temperature and ensures that they are satisfactory for controller operation. The acceptable temperature levels are listed in Table 2-11.
Chapter 3 Maintenance This chapter describes how to interpret the status of the LEDs on the pedestal and use them as a troubleshooting aid during a pedestal malfunction. Both the pedestal LEDs and the LEDs on the major components are covered. The chapter also describes how to replace a Field Replaceable Unit (FRU) and how to reconfigure the SCSI bus. Troubleshooting the pedestal consists of monitoring the status of the external LEDs to determine if a major component is malfunctioning.
3-2 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide The information in this chapter is divided into the following major sections: ■ Pedestal status and power supply LEDs ■ SBB status LEDs ■ Controller LEDs ■ EMU error reporting ■ Replacing an FRU ■ Reconfiguring the UltraSCSI bus ■ Replacing the controller memory cache modules Pedestal Status and Power LEDs The pedestal is equipped with two front panel LEDs that monitor the following error conditions (Figure 3–1): ■ A power
Maintenance 3-3 Figure 3-1 shows the Pedestal status LEDs. Figure 3-1. Pedestal status LEDs SBB Status LEDs Each disk drive SBB in the pedestal has two status LEDs— a green activity LED and an amber fault LED as shown in Figure 3–2. When the pedestal is operating properly, the activity LED is flashing indicating normal disk activity on the SCSI bus, and the fault LED is off. Table 3–1 lists the states of the SBB LEDs and recommends corrective actions when an LED indicates a fault condition.
3-4 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Table 3-1 Disk Drive SBB Status LEDs Activity LED Fault LED Indication On Off Drive is operating properly. Off Off Drive is inactive and operating normally. There is no fault. On On Fault status: drive is defective. Recommend that you replace the device. Off On Fault status: drive is inactive and not spinning. Recommend that you replace the device.
Maintenance 3-5 EMU Error Reporting The primary function of the EMU is to detect and report conditions that can cause the pedestal to malfunction and to report malfunctions.
3-6 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Whenever any of the following error conditions occur, the amber fault LED on the front of the pedestal will turn on.
Maintenance 3-7 Removing the Pedestal Door Proceed as follows to remove the pedestal door (Figure 3–3): 1. Unlock and open the door to a 90º angle in relation to the closed position. 2. Carefully lift up on the door until the hinge pins are against the top of the mounting holes. 3. Pull the door straight out until the hinge pins clear the bezel. Figure 3-3.
3-8 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide CAUTION: Always use both hands when removing or inserting an SBB. ■ Never remove a drive from the pedestal before it has completely spun down. ■ Take care not to slam the replacement SBB into the pedestal enclosure. 1. Unlock and open the front door. 2. Release the drive from the pedestal slot by squeezing the mounting tabs on the SBB together, but do not remove the SBB from the pedestal. 3.
Maintenance 3-9 Replacing a Power Supply You can replace a power supply without affecting pedestal operation using the following procedure: CAUTION: When you remove a power supply, the airflow through the SBBs is interrupted. Always install the replacement power supply as quickly as possible to prevent overheating. 1. Grasp the power supply handle shown in Figure 3–5. 2. Slide and hold the locking latch to the left and pull the supply out using a short jerking motion. 3.
3-10 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Replacing the RAID Array Controller Perform the following procedure to replace the RAID array controller (Figure 3–6): 1. Grip the two locking latches on the front panel of the controller and pull them forward until the controller disengages from its mounting slot. 2. Remove the controller by sliding it forward and free of the pedestal. 3.
Maintenance 3-11 Replacing the EMU Board WARNING: Only qualified service personnel should replace the EMU. Dangerous voltages are exposed when the pedestal side panel is removed. Always power off the pedestal and remove the power cords before replacing the EMU. Tools required: ■ Flat-blade or 3/16 in(5 mm) hex-head screwdriver ■ # 10 TORX-head screwdriver Perform the following procedure to replace the EMU Board: 1. Quiesce the host bus by shutting down the host system.
3-12 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Figure 3-7 shows how to remove standoffs from the UPS and external fault connectors. 3000-49 Figure 3-7. Remove standoffs from UPS and external fault connectors 11. Align the connectors on the replacement EMU with the connector holes on the rear panel and replace the mounting studs to secure the board (Do not over-tighten). 12. Reconnect the two ribbon cables to the rear connectors on the EMU board. 13.
Maintenance 3-13 Replacing the UPS Proceed as follows to replace the UPS: 1. Ensure the UPS power switch is set to off. 2. Disconnect the pedestal power cord from the UPS. 3. Disconnect the UPS power cord from the wall outlet. 4. Disconnect the signal control cable from the UPS 5. Install the replacement UPS and reconnect the power cords and the signal control cable. 6. Set the UPS power switch to “on” and then power up the pedestal.
3-14 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Table 3-2 SCSI Bus Length and External Cables Bus Rate Bus Length Longest COMPAQ Cable Speed MT/s Mb/s Meters Feet Number Meters Feet Fast 20 40 25 82 BN21K-23 BN21L-23 23 82 The SCSI bus in your pedestal is factory-configured as a split bus. One bus is designated bus D0 and the other as bus D1.
Maintenance 3-15 The SCSI bus configuration switch selects the eight (0 – 7) SCSI bus configurations in the pedestal. Each bus configuration determines the slot device addresses (0 – 6) for both 8-bit and 16-bit devices. The pedestal is configured at the factory for split-bus operation (configuration switch set to 6). To change the configuration of the bus, you must remove the left side panel to gain access to the backplane and the configuration switch.
3-16 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Figure 3-8 shows how to remove the screw and panel. Figure 3-8. Remove screw and panel Figure 3–9 shows the location of the switch. Figure 3–10 shows the separate step switches to set the subsystem to the desired SCSI bus configuration (refer to the label at bottom of pedestal to cross-reference slot SCSI ID addresses with switch settings).
Maintenance 3-17 NOTE: To decrease the configuration number, Press the upper switch to step the address down one address at a time (decrement) until the desired configuration number is displayed. To increase the configuration number, press the lower switch to step the address up one address at a time (increment) until the desired configuration number is displayed. 10. Close the side panels and replace the cover screw. 6 3000-38 Figure 3-9. Location of SCSI bus configuration switch 6 Figure 3-10.
3-18 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Replacing the Controller Memory Cache Modules The two memory cache modules in the RAID controller are replaced by removing the controller from the pedestal to gain access to the modules. Then, place the controller on a flat working surface and proceed as follows: WARNING: To prevent an electrical discharge from damaging the SIMMs, always wear an ESD wrist strap connected to a suitable ground when handling the memory chips. 1.
Maintenance 3-19 Figure 3-12 shows how to release the locking clips. Figure 3-12. Release locking clips Figure 3-13 shows how to remove the installed SIMM modules. Figure 13. Remove installed SIMM modules CAUTION: Ensure the “ side 1” side of the two replacement SIMMs is facing toward you when installing the modules in the following step.
3-20 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide 5. Installed the two replacement memory modules by aligning the module and connector pins (check alignment guide in center of module) and gently pivot the module the main controller board until it snaps into place (Figures 3–14 and 3–15). 6. Replace the controller into the pedestal. 7. Power on the UPS and pedestal and check the activity LEDs on the front panel of the controller.
Chapter 4 Expansion Pedestal Option This chapter describes the major features of the expansion pedestal option and how to connect the option to your RAID Array 3000 storage subsystem. Product Description The StorageWorks pedestal expansion option is designed to expand the storage capacity of the RAID Array 3000 subsystem (Figure 4–1).
4-2 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Figure 4-1 shows the Expansion Pedestal. Figure 4-1. Expansion pedestal Expansion Pedestal Cabinet The expansion pedestal cabinet is a modular, freestanding storage cabinet that is completely self contained with dual fan-cooled power supplies, an internal UltraSCSI single-ended extender module, and an internal EMU circuit board.
Expansion Pedestal Option 4-3 ■ There is a single 68-pin, VHDC female SCSI connector on the rear panel which interconnects the SBB expansion pedestal to the controller pedestal. ■ The rear panel contains an alarm switch and an external fault condition connector. ■ The expansion pedestal contains two interchangeable fan-cooled AC power supplies for redundant power.
4-4 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Figure 4-3 shows the rear panel power supplies. Figure 4-3. Rear panel power supplies Expansion Pedestal Components The expansion pedestal contains a 16-bit, wide/differential UltraSCSI bus, an Environmental Monitor Unit (EMU), a SCSI bus extender module, and two universal 50/60 Hz, 100–240 VAC fan-cooled power supplies.
Expansion Pedestal Option 4-5 The SCSI bus extender module extends the allowable electrical length of the bus to accommodate longer physical SCSI cable connections between the base and expansion pedestals. The EMU is an internal circuit board, which monitors the operation of the pedestal (Figure 4–4). The EMU monitors power supply voltages, fans, temperatures that are reported to the user, and controls (turns on and off) the audible alarm and status LED on the front panel of the pedestal.
4-6 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Reconfiguring Base Pedestal UltraSCSI Bus WARNING: Only qualified service personnel should reconfigure the base pedestal. Dangerous voltages are present within the subsystem. To prevent electrical shock, always turn the subsystem off and disconnect the power cords before removing the side panel. The RAID Array 3000 base pedestal is factory-configured for split-bus operation.
Expansion Pedestal Option 4-7 7. Remove the side cover from the base pedestal (Figure 4–5). Figure 4-5. Remove side cover from base pedestal 8. Remove the bus terminator from backplane connector J11 (➊ Figure 4–6). 1 SHR-1495 Figure 4-6.
4-8 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide 9. Remove the SCSI cable from device # 1 connector and backplane connector J16 (➊ Figure 4–7). 1 SHR-1495 Figure 4-7.
Expansion Pedestal Option 4-9 10. Connect jumper cable 17-04166-03 between the backplane connector J11 and the backplane connector J16 (Figure 4–8). J11 J16 Connect Jumper Cable Figure 4-8.
4-10 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide 11. Remove the knock-out plate located above the D1 OUT label on the rear panel of the base pedestal (Figure 4–9). Remove Knockout from D1 Out 3000-45 Figure 4-9.
Expansion Pedestal Option 4-11 12. Connect cable assembly 17-04454-01 between the D1 OUT bulkhead opening and the device # 1 backplane connector (Figure 4–10). Secure the bulkhead connector by tightening the two 6-32 SEM screws. Connect SCSI Cable Figure 4-10.
4-12 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Set the bus configuration switch to 7 (Figures 4–11 and 4–12). 7 3000-44 Figure 4-11. Set configuration switch to 7 Figure 4-12.
Expansion Pedestal Option 4-13 Figure 4–13 shows the reconfigured SCSI bus addresses of the expanded subsystem Figure 4-13.
4-14 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide 13. Reinstall the side panel on the base pedestal. 14. Connect the HD68-to-HD68 SCSI cable from the D1 OUT connector on the base pedestal to the D1 IN connector on the rear of the expansion pedestal as shown in Figure 4–14. Base Pedestal Expansion Pedestal Figure 4-14.
Expansion Pedestal Option 4-15 15. Make the power cable connections between the expansion pedestal, the UPS, and the AC power source (Figure 4–15). UPS Connector Base Pedestal AC Power Expansion Pedestal AC Power AC Power UPS 3000-50 Figure 4-15. Power cable connections CAUTION: If you want to maintain the existing RAID level configuration, three drives must be relocated from the base pedestal to specific slots in the expansion pedestal as described in step 13.
4-16 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide 16. Transfer the bottom three disk drives (slots 4, 5, and 6) from the base pedestal to the top three slot locations (slots 0, 1, and 2) in the expansion pedestal as shown in Figure 4–16. ID = 8 ID = 8 ID = 9 ID = 9 ID = 10 ID = 10 ID = 11 ID = 11 ID = 8 ID = 12 ID = 9 ID = 13 ID = 10 ID = 14 Base Pedestal Expansion Pedestal 3000-46 Figure 4-16. Transfer drives from base to expansion pedestal 17.
Chapter 5 Second Controller Option This chapter describes how to install a second RAID controller in the RAID Array 3000 pedestal. The second controller option adds a fail/safe feature to your storage subsystem. The chapter also contains a procedure describing how to configure the subsystem for dual-controller operation when only one serial port is available on the host.
5-2 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Second Controller Option Kit Perform an inventory of the items contained in the second controller kit option. The kit should contain the following: ■ RAID Array 3000 controller ■ For option kit DS-HSZ22-AA, 3 SIMMs ■ For option kit DS-HSZ22-AB, 4 SIMMs ■ CD with new firmware ■ Model label ■ Warranty card ■ This guide Second Controller Slot 3000-48 Figure 5-1.
Second Controller Option 5-3 Installing the Upgrade WARNING: To prevent an electrical discharge from damaging the SIMMs, always wear an ESD wrist or foot strap connected to a suitable ground when handling the memory modules. NOTE: You can upgrade your firmware using the SCSI or network connection methods. These methods provide the fastest way to upgrade your firmware. To update your controller’s firmware, proceed as follows.
5-4 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide A Save Configuration screen with a Save to File field appears as shown in Figure 5-3. The example in Figure 5-3 shows the file name as c:\config1. Enter your file name in the Save to File field and click Save. Figure 5-3. Saved configuration Updating Firmware CAUTION: If the systems disk is on the RA3000, firmware cannot be upgraded with SWCC.
Second Controller Option 5-5 A window will appear asking you to specify the firmware file that you want to load (Figure 5-5). This file resides on the CD supplied with the controller kit option. You can easily identify Firmware software by its .FDI extension. Enter the .FDI file name (for example, D:\FIRMWARE\XXX.FDI), then click Start Update. Upon completion of the Firmware update, the system will automatically reboot and update the controller’s firmware. Figure 5-5.
5-6 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide 6. Choose menu item (2). “Change serial baud rate”. Select 38400. When presented with the “Please change your baud rate and press Return” message, do so from within HyperTerminal via the File\Properties menu, then choose Configure. If there is no response from the utility after changing the baud rate, proceed with step 7. 7. After changing the baud rate, you may have to close and reenter HyperTerminal.
Second Controller Option 5-7 Installing Two SIMMs into Second Controller 1. Install two of the SIMM modules into the second controller (make sure all SIMM modules are of the same type) by aligning the connector pins and inserting the modules into the SIMM module connectors as shown in Figure 5-6. Figure 5-6. Insert SIMM into connector 2. Ensure the SIMM is firmly seated and then gently pivot it toward the controller board until it snaps into place as shown in Figure 5-7. Figure 5-7.
5-8 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Replacing Existing Controller 1. Replace the existing controller with the new controller (Figure 5-8 to remove). Figure 5-8 Remove controller from top slot NOTE: Ensure that you install the new controller in the same slot as the existing controller removed in step 1. Do not leave the existing controller in the pedestal while performing the following step. 2.
Second Controller Option 5-9 Restoring the Configuration To restore your configuration to the new controller: 1. Restart SWCC in the Serial Mode (refer to the Getting Started RAID Array 3000 Installation Guide for your host system guide for instructions). 2. Select the Storage pull-down menu from the Toolbar, then choose Controller. 3. From the Controller pull-down menu, select Configuration, and then Restore (Figure 5-9). Figure 5-9.
5-10 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide The saved configuration screen with a Restore from File field appears as shown in the example of Figure 5-10. Figure 5-10. Restored configuration example NOTE: Restoring the configuration in the following step may take up to 5 minutes. 4. Enter the file name that you saved in “Saving Existing Configuration” and click Restore. Updating Firmware on Second Controller 1.
Second Controller Option 5-11 Installing Original Controller 1. If installing option kit DS-HSZ22-AA, add the second SIMM to the original controller. If installing option kit DS-HSZ22-AB, replace the existing SIMM with the two remaining SIMMs supplied with the kit. (see “Install Two SIMMs Into Second Controller” for instructions). 2. Install the second controller into the pedestal (or controller shelf) and power up the system. The system is now in the dual-redundant operating mode. 3.
5-12 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Configuring the RA3000 for the Active Mode of Operation If you are upgrading from a single controller storage system, the installed controller will be in the active/passive mode of operation. To configure the storage system using a single serial connection, the dual controllers must be placed in Active/Active mode. Perform the procedure to change your storage system from “Active/Passive” to “Active/Active” mode of operation. 1.
Second Controller Option 5-13 Your storage system is now properly configured for dual controller operation from a single serial host port. Proceed to the next section to configure the controllers. Configuring the Dual Controllers In order to create a virtual disk, a serial connection must be made to the controller. The serial connection provides a local connection to the RA3000 (HSZ22) controller. To configure the controller, perform the following steps: 1. Ensure the RA3000 Storage System is turned off.
5-14 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide NOTE: If the storage window connection is lost when the cable is moved, reopen the HSZ22 StorageWindow). 16. Once the second Virtual Disk has been created, close the StorageWorks window. 17.
Second Controller Option 5-15 Verifying the Controller Operating Parameters For optimal dual-controller performance and load balancing, the host ports should be configured as listed below.