45xx Modular Disk Subsystem Manual for G-Series Releases Abstract This manual describes the installation and operation of the 45xx modular disk subsystem, which is connected to a 6760 ServerNet device adapter in a Himalaya S-series server. Product Version N.A. Supported Releases This manual supports G06.01 and all subsequent G-series releases until otherwise indicated in a new edition.
Document History Part Number Product Version Published 142466 N.A. August 1998 Ordering Information For manual ordering information: domestic U.S. customers, call 1-800-243-6886; international customers, contact your local sales representative. Document Disclaimer Information contained in a manual is subject to change without notice. Please check with your authorized Tandem representative to make sure you have the most recent information.
45xx Modular Disk Subsystem Manual for G-Series Releases Glossary Index Examples Figures What’s New in This Manual v Manual Information v New and Changed Information v About This Manual vii Who Should Use This Manual What’s in This Manual vii vii Where to Get More Information viii Your Comments Invited viii Notation Conventions viii 1.
1. Introduction (continued) Contents 1. Introduction (continued) Fault Tolerance 1-13 455DS Decision-Support Disk Module 1-15 Site Preparation 1-16 Service Clearances 1-16 Modular Storage System Height Limitations 1-17 2. Installing and Configuring the 6760 Adapter 3.
4. Installing and Removing CRUs (continued) Contents 4. Installing and Removing CRUs (continued) Resuming Operations on a BEB 4-12 Replacing a Power Supply 4-13 Before You Start 4-13 Removing a Power Supply Installing a Power Supply 4-14 4-14 4-15 Replacing a 6760 ServerNet Device Adapter Safety and Compliance Glossary Index Examples Example 4-1. Using SCF to Bring Up Paths to a BEB 4-13 Figures Figure 1-1. Two 45xx Disk Modules Mounted in a Modular Storage System Figure 1-2.
Tables Contents Tables Table 1-1. Product Numbers for the 45xx Modular Disk Subsystem Table 1-2. Part Numbers for 45xx Subsystem CRUs Table 1-3. Components of the 455mod8 and 455DS Disk Modules Table 1-4. Disk Drive Specifications 1-8 Table 3-1.
What’s New in This Manual Manual Information 45xx Modular Disk Subsystem Manual for G-Series Releases Abstract This manual describes the installation and operation of the 45xx modular disk subsystem, which is connected to a 6760 ServerNet device adapter in a Himalaya S-series server. Product Version N.A. Supported Releases This manual supports G06.01 and all subsequent G-series releases until otherwise indicated in a new edition.
What’s New in This Manual New and Changed Information 45xx Modular Disk Subsystem Manual for G-Series Releases —142466 vi
About This Manual This manual describes the installation and operation of the 45xx modular disk subsystem, which is connected to a 6760 ServerNet device adapter in a Himalaya S-series server. This manual includes information about 4560, 4570, 4580, and 4590 disk drives for Himalaya S-series servers on G06.01 and subsequent G-series releases.
Where to Get More Information About This Manual Where to Get More Information For more information, refer to the following manuals: • • 6760 ServerNet/DA Manual describes the 6760 adapter and how to install, configure, and move it. SCF Reference Manual for the Storage Subsystem describes how to use the Subsystem Control Facility (SCF) to configure, control, and inquire about storage devices on a Himalaya S-series server.
General Syntax Notation About This Manual A group of items enclosed in brackets is a list from which you can choose one item or none. The items in the list may be arranged either vertically, with aligned brackets on each side of the list, or horizontally, enclosed in a pair of brackets and separated by vertical lines. For example: FC [ num ] [ -num ] [ text ] K [ X | D ] address-1 { } Braces. A group of items enclosed in braces is a list from which you are required to choose one item.
General Syntax Notation About This Manual If there is no space between two items, spaces are not permitted. In the following example, there are no spaces permitted between the period and any other items: $process-name.#su-name Line Spacing. If the syntax of a command is too long to fit on a single line, each continuation line is indented three spaces and is separated from the preceding line by a blank line.
1 Introduction What’s in This Section This section introduces the 45xx modular disk subsystem and its components.
The Modular Storage System Introduction The stack of modules is supported by a pedestal that can also contain modules and provides casters and levelers for the entire structure. Two pedestals are available: • • The 7159 pedestal (which can contain two 45xx disk modules) The 7150 pedestal (which contains other types of disk modules) Figure 1-1 shows a modular storage system stack containing two 45xx disk modules in a frame supported by an empty pedestal. Figure 1-1.
Customer-Replaceable Units (CRUs) Introduction Table 1-1 shows the product numbers for the components of the 45xx modular disk subsystem. Table 1-1.
Components of a 45xx Disk Module Introduction Table 1-2 lists Tandem part numbers for 45xx modular disk subsystem CRUs. The product numbers for the 6760 adapter and part numbers for the fiber-optic cables are provided in the 6760 ServerNet/DA Manual. Table 1-2.
Comparing the 455mod8 and 455DS Disk Modules Introduction Figure 1-2. Components of a 45xx Disk Module Redundant BEB (455mod8 module only*) Back Section AC Power Cord Front Section Power Supply Module Redundant Power Supply and AC Power Cord (455mod8 module only*) Fan CRU CDT 004.CDD BEB * To maintain airflow in a 455DS module, blank partitions replace the redundant power supply and BEB.
Module Sections Introduction Module Sections The 45xx disk module consists of two sections: the front section and the back section. See Figure 1-2 on page 1-5. The front section contains the disk drives and the midplane. This section is accessed from the front of the modular storage system. Special cover plates are installed in empty disk drive slots to keep air flow distributed evenly throughout the module. The back section contains the back-end boards (BEBs), power supplies, and fans.
Disk Drives Introduction Figure 1-3. Module and Disk Drive LEDs Module LED (Amber-Orange) Module LED (Green) Ejector Disk Drive Activity LED (Amber-Orange) Disk drive Power-On LED (Green) CDT 005.CDD Disk Drive Ejectors Each disk drive has an ejector (shown in Figure 1-3) that, when closed, seats the drive in its connector on the midplane. This ejector can be locked to prevent unauthorized removal of the disk drive.
Back-End Boards (BEBs) Introduction Disk Drive Specifications Although some specifications of individual disk drives used in the 45xx modular disk subsystem might differ slightly, Table 1-4 shows the specifications that are typical. Table 1-4. Disk Drive Specifications Characteristic 4560 4570 4580 4590 Storage capacity, formatted (GB) 2.0 4.2 8.8 17.9 Form factor (inches) 3.5 3.5 3.5 3.
Power Supplies Introduction Figure 1-4. Back-End Board (BEB) LEDs Green LED Amber-Orange LEDs CDT 006.CDD Detail of BEB LEDs Power Supplies The 455mod8 module contains two power supplies, each with its own AC power cord. The 455DS module contains one power supply and one AC power cord. Figure 1-5 shows the power supplies. Figure 1-5. Power Supplies AC Power Cord Retainer Redundant Power Supply (455mod8 Module Only) ON/OFF Switch Green LED CDT 007.
Power Supplies Introduction ON/OFF Switch and AC Power Cord Retainer Each power supply has an ON/OFF switch and an AC power cord retainer (see Figure 1-5). The AC power cord retainer: • • Holds the AC power cord in place on the power supply. After the AC power cord has been plugged in to the power supply, the retainer slides outward to cover the cord. With the retainer in the outward position, the power supply can be powered on by pushing the ON/OFF switch to the ON position.
Fan CRUs Introduction Figure 1-6. Power Distribution in a 45xx Disk Module Back-End Board (BEB) Redundant Back-End Board (BEB)* Redundant Power Supply* Power Supply 5V 5V *** *** 6.3 V 13.8 V 6.3 V 13.8 V Midplane Printed Wiring Assembly (distributes 13.8 and 6.
Interface Components Introduction Interface Components The 45xx modular disk subsystem uses the following components to communicate with a Tandem host system: • • 6760 ServerNet device adapter (containing one or more SACs) Fiber-optic cables 6760 ServerNet Device Adapter The 6760 ServerNet device adapter manages input/output (I/O) operations for the 45xx modular disk subsystem on Himalaya S-series servers.
Fiber-Optic Cables Introduction 6760 Adapter and SAC LEDs Each 6760 adapter has two LEDs indicating hardware status. • • The green LED indicates that the adapter is powered on, and it is normally lit. The amber LED indicates hardware faults. The fiber-optic SAC has an amber LED that is lit when fiber-optic light is present. For troubleshooting information about the 6760 adapter and its SACs, see the 6760 ServerNet/DA Manual.
Fault Tolerance Introduction module, different paths exist to the data stored on the primary and mirror disks, as shown in Figure 1-8. Therefore, if access to one module fails, the system can still access the other half of the mirrored volume that is configured in another module, thus preserving operations. Figure 1-8.
455DS Decision-Support Disk Module Introduction Figure 1-9. Four-Adapter Configuration 6760 Adapter 45xx Disk Module 6760 Adapter 6760 Adapter SAC 4 SAC 3 6760 Adapter SAC 4 SAC 3 SAC 4 SAC 2 SAC 3 SAC 1 SAC 4 Primary BEB SAC 3 SAC 2 Backup BEB SAC 1 SAC 2 45xx Disk Module SAC 1 Mirror SAC 2 BEB SAC 1 BEB Mirror Backup CDT 002.CDD For improved performance, be sure to balance the disk configuration so that all processors are equally busy.
Site Preparation Introduction Site Preparation This subsection contains specifications concerning site preparation. Service Clearances When planning the location of the 45xx modular disk subsystem, consider the following: • • The modular storage system occupies 67 centimeters by 89 centimeters (26 inches by 35 inches) of floor space. You must allow a clearance of at least 122 centimeters (48 inches) at the front and rear of the modular storage system for adequate ventilation and for servicing.
Modular Storage System Height Limitations Introduction Figure 1-10. Service Clearances Modular Storage System Height Limitations A modular storage system stack is limited to a maximum installed height of one 7159 pedestal and four frames (10 modules maximum). This height is equivalent to 205 centimeters (80 inches) from the floor to the top surface of the stack (if using a 7159 pedestal). See Figure 1-11 on page 1-18.
Modular Storage System Height Limitations Introduction Figure 1-11. Modular Storage System Height Limitations Module 10 Frame Position E 205 cm (80.7 inches) Module 9 Module 8 Frame Position D 167 cm (65.6 inches) Module 7 Module 6 128 cm (50.5 inches) Frame Position C Maximum Shipping Height for Preassembled Stacks Module 5 Module 4 Frame Position B 90 cm (35.4 inches) Module 3 Pedestal Position A Module 2 51 cm (20.2 inches) Module 1 7159 Pedestal CDT 038.
2 Installing and Configuring the 6760 Adapter The 6760 ServerNet/DA Manual introduces the 6760 adapter and provides all of the details about installing, configuring, moving, and testing the 6760 ServerNet device adapter. The 6760 ServerNet/DA Manual also describes how to use the TSM package for testing the ServerNet addressable controllers (SACs) installed in a 6760 adapter and testing the devices connected to those SACs.
Installing and Configuring the 6760 Adapter 45xx Modular Disk Subsystem Manual for G-Series Releases —142466 2 -2
3 Checking Hardware Operation What’s in This Section This section describes troubleshooting procedures you can use on the 45xx modular disk subsystem.
Checking Hardware Operation What Component LEDs indicate Table 3-1. Component LEDs (page 2 of 2) Component LED Color LED Is Normally Notes Disk Drive Amber-orange Lit This LED is lit when the system is polling or accessing the disk drive. Disk module Green Lit This LED indicates that at least one BEB is installed and powered on. You can use the TSM FLASH command to flash this LED. Disk module Amber-orange Not lit This LED is currently unused.
Troubleshooting Hardware Checking Hardware Operation Troubleshooting Hardware Use the following troubleshooting information to help identify and correct problems with the 45xx modular disk subsystem. Each table addresses a specific problem, lists symptoms related to the possible cause of the problem, and lists possible corrective actions. If you need further help, call your service provider.
Checking Hardware Operation Troubleshooting With the TSM Package Amber-Orange LED (in the Middle) Not Lit on a BEB Symptom Corrective Action • • • • Amber-orange LED (in the middle) is not lit on a BEB. Make sure the BEB is powered on. Make sure the 6760 adapter is powered on. Check the integrity of the fiber-optic cable connection: 1. Inspect the cable connectors at both the SAC and BEB ends. Make sure the connectors are inserted properly. The connector keyway must fit the key in the receptacle. 2.
Checking Hardware Operation Troubleshooting Fiber-Optic Cables Troubleshooting Fiber-Optic Cables When troubleshooting for suspected fiber-optic power loss, first verify that the connector ends of the fiber-optic cable are not contaminated. The connectors can cause excessive optical losses if they become contaminated with dust particles, oil from skin, or other foreign matter. This is why it is important to keep the dust cover on the connector when the cable is not in use.
Checking Hardware Operation Cleaning the Cable Connector 45xx Modular Disk Subsystem Manual for G-Series Releases —142466 3 -6
4 Installing and Removing CRUs This section describes procedures for removing and installing customer-replaceable units (CRUs) in the 45xx modular disk subsystem. You can remove and install these components without using special tools. Information on installing and removing the 6760 ServerNet device adapter is in the 6760 ServerNet/DA Manual.
Preparing to Replace a 45xx Disk Drive Installing and Removing CRUs Figure 4-1 shows the slot locations, unit numbers, and quadrants for disk drives in a 45xx disk module. Figure 4-1. 45xx Disk Module Slot, Unit Numbers, and Quadrants Preparing to Replace a 45xx Disk Drive Key points to know when replacing a 45xx disk drive are: What to remove or install: A 4560, 4570, 4580, or 4590 disk drive, or an empty drive slot cover plate.
Installing and Removing CRUs Preparing to Replace a 45xx Disk Drive Preparing to Replace a Nonmirrored 45xx Disk Drive If a disk 45xx drive is no longer usable and it has no mirror disk, data written to the disk since the last backup is lost. 1. Stop any application software that is using the 45xx disk drive to be removed. If you can, make a backup copy of all the files on that disk. 2. Use the SCF STOPOPENS command to prevent users from opening files on that disk.
Installing and Removing CRUs Removing a 45xx Disk Drive 4. You are now ready to remove the disk drive from its slot. Continue with the following topic Removing a 45xx Disk Drive. Removing a 45xx Disk Drive Before you begin to remove a 45xx disk drive from its slot, make sure you have completed the steps in Preparing to Replace a 45xx Disk Drive on page 4-2; Then follow this procedure (see Figure 4-2): 1.
Removing a 45xx Disk Drive Installing and Removing CRUs Figure 4-2. Removing or Installing a 45xx Disk Drive One-quarter turn counterclockwise to unlock CDT 027.
Installing and Removing CRUs Installing a 45xx Disk Drive Installing a 45xx Disk Drive Follow this procedure to install a 45xx disk drive in a slot in a 45xx disk module: Notes. • If you are adding a disk drive to the module, then to maximize fault tolerance, add disk drives to the slots of the module in the following order: 0, 2, 4, 6, 1, 3, 5, 7 • You should never install both disk drives of a mirrored volume in the same 455DS module, because it does not have redundant data paths or power supplies.
Replacing a Fan CRU Installing and Removing CRUs 4. If the disk drive you replaced was unusable, use the RESTORE utility to update the newly installed disk drive from your latest backup. Because it was operating as a nonmirrored disk, data written to the defective disk drive since the last backup is lost. 5. If necessary, restart any application software that uses this disk drive. Resuming Operations on a Mirrored 45xx Disk Drive 1. To bring up the paths to the disk drive: a.
Installing and Removing CRUs Removing a Fan CRU Without an Ejector Removing a Fan CRU Without an Ejector To remove a fan CRU that does not have an ejector, follow this procedure (see Figure 4-3): 1. Supporting the fan CRU with both hands, unlatch the fan CRU by pulling on the left side handle to disengage the snap studs of the fan CRU from the back section of the 45xx module. 2. Lift the fan CRU back and away from the module. Figure 4-3.
Installing and Removing CRUs Removing a Fan CRU With an Ejector 4. To check that the interface bracket positioned in Step 1 is securely in place, pull back on the right-hand side of the fan CRU. If it is not secure, remove the fan CRU and start again at Step 1. Removing a Fan CRU With an Ejector To remove a fan CRU that has an ejector, follow this procedure (see Figure 4-4): 1.
Installing a Fan CRU With an Ejector Installing and Removing CRUs Installing a Fan CRU With an Ejector To install a fan CRU that has an ejector, use this procedure (see Figure 4-4 on page 4-9): 1. Make sure the ejector on the fan CRU is lifted up before you start. If it is not, press the blue button on the ejector and lift the ejector. 2.
Installing and Removing CRUs Preparing to Replace a BEB Preparing to Replace a BEB To prepare for BEB replacement, use SCF to bring down the paths to the disk drives controlled by the BEB you are replacing. You need to: 1. Determine which paths uses the BEB you are replacing. 2. Use the SCF INFO ADAPTER command to verify which paths the SACs are using. If there is only one BEB in the module, use the SCF STOPOPENS command to stop access to all disk drives in this module, while you replace the BEB. 3.
Installing and Removing CRUs Installing a BEB Figure 4-5. Removing or Installing a BEB Installing a BEB To install a BEB, follow this procedure (see Figure 4-5 on page 4-12): 1. Verify that the BEB you are installing has the same part number as the BEB you are replacing. (Refer to Table 1-2 on page 1-4.) 2. Hold the replacement BEB so that it is oriented with the indicator LEDs to the right of the fiber-optic connector. Also make sure that the BEB ejectors are unlocked. 3.
Replacing a Power Supply Installing and Removing CRUs Example 4-1. Using SCF to Bring Up Paths to a BEB -> -> -> -> RESET $DATA00-M START $DATA00-M STATUS $DATA00 exit 2. Test the path you’ve just brought up by using the TSM package. For examples, see the 6760 ServerNet/DA Manual. If the test fails, notify your service provider. 3. Use SCF to bring up the paths to the drives that use the new BEB (See example Example 4-1). 4.
Installing and Removing CRUs Removing a Power Supply Removing a Power Supply To remove a power supply, follow these steps (see Figure 4-6 and Figure 1-5 on page 1-9): Note. If you are removing the only power supply in a 455DS disk module, you must first stop all applications that are using the disk drives in that module. 1. Remove the fan CRU from the module as described in Replacing a Fan CRU on page 4-7. Caution. Do not remove the fan CRU from a powered module for more than 10 minutes.
Installing and Removing CRUs Replacing a 6760 ServerNet Device Adapter Figure 4-6. Removing or Installing a Power Supply Replacing a 6760 ServerNet Device Adapter For information about replacing a 6760 ServerNet device adapter, see the 6760 ServerNet/DA Manual.
Installing and Removing CRUs Replacing a 6760 ServerNet Device Adapter 45xx Modular Disk Subsystem Manual for G-Series Releases —142466 4- 16
Safety and Compliance Regulatory Compliance Statements The following warning and regulatory compliance statements apply to the products documented by this manual. WARNING. This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Safety and Compliance Regulatory Compliance Statements 45xx Modular Disk Subsystem Manual for G-Series Releases —142466 Statements -2
Glossary 45xx modular disk subsystem. A disk subsystem consisting of up to eight 2-gigabyte (GB), 4-GB, 8-GB, or 18-GB, 3.5-inch, 45xx disk drives in a module. Two of these modules (up to 16 disk drives) can be mounted in a frame that is part of the Tandem modular storage system. Up to 10 modules can be stacked to provide up to 1440 gigabytes of formatted storage while using only 0.6 square meters (6.3 square feet) of floor space.
disk subsystem. Glossary optical disk is provided by a low-intensity laser. Optical disk drives are not supported in G-series releases. See also volume. disk subsystem. See 45xx modular disk subsystem. EEPROM. See electrically erasable programmable read-only memory (EEPROM). electrically erasable programmable read-only memory (EEPROM). Memory that is used to store firmware for controlling a hardware device. File Utility Program (FUP).
mirrored disk or volume Glossary mirrored disk or volume. A pair of identical disk drives that are used together as a single logical volume. One drive is considered primary and the other is called the mirror. Each byte of data written to the primary drive is also written to the mirror drive; if the primary drive fails, the mirror drive can continue operations. Each drive has the same volume name, but the name has a suffix to show which drive is the primary (-P) and which is the mirror (-M).
SCSI terminator Glossary SCSI terminator. A special signal connector attached to the end of a small computer system interface (SCSI) daisy chain. ServerNet addressable controller (SAC). A controller with a fiber-optic interface, which, in the 6760 ServerNet device adapter, serves the same purpose as the 3128, 3129, and 3216 fiber-optic interface controllers used in the Himalaya K-series servers. slot.
Index Numbers 455DS disk module See also Disk module comparing to 455mod8 1-5 mirroring disks in 1-15 upgrading to 455mod8 1-15 455mod8 disk module See also Disk module comparing to 455DS 1-5 upgrading from 455DS 1-15 6760 ServerNet device adapter fault tolerance 1-13 four-adapter configuration 1-15 LEDs 1-13 replacing 4-15 two-adapter configuration 1-14 6761 See ServerNet addressable controller (SAC) 7159 pedestal 1-2 A A/C power cord See Power cord B Back-end boards (BEBs) description 1-8 fault toleranc
E Index Disk module 455DS See 455DS disk module 455mod8 See 455mod8 disk module A/C power cord See Power cord fault tolerance 1-13 fiber-optic cables See Fiber-optic cables front section 1-6 LEDs 1-6, 3-1 power distribution 1-10 power supplies 1-4, 1-9 product number 1-3 product numbers 1-3 slot numbers 4-2 Drive CRU See Disk drives E Empty disk drive slot cover plate 1-6, 4-1 Empty module cover plate 1-4 F Fan CRUs described 1-11 installing 4-8, 4-10 part numbers 1-4 removing 4-9 replacing 4-7 Fault to
M Index M Maximum shipping height 1-2, 1-17 Mirrored 45xx disk drive preparing to replace 4-3 resuming operations 4-7 Modular storage system described 1-1 floor space requirements 1-16 height limitations 1-17 height limitations, shipping 1-2 service clearance 1-16 Module See Disk module N Nonmirrored 45xx disk drive preparing to replace 4-3 resuming operations 4-6 O Operations resuming, on a BEB 4-12 resuming, on a disk drive 4-6 Optical carrier signal 1-13 Optical data link 1-13 Power cord length 1-16
S Index Resuming operations after replacing a BEB 4-12 after replacing a disk drive 4-6 Retainer, A/C power cord 1-10 S ServerNet addressable controller (SAC) fault tolerance 1-13 LEDs 1-13 optical data link connector 1-13 product number 1-3 Service clearance 1-16 Servicing by replacement 1-3 Shipping height, maximum 1-2, 1-17 Site preparation 1-16 Slot numbers, modular disk drive 4-2 Space, disk subsystem requirements 1-16 Specifications disk drive 1-8 site preparation 1-16 Stack height limit 1-2 System
