Service Source Xserve RAID 17 March 2003 © 2003 Apple Computer, Inc. All rights reserved.
Service Source Basics Xserve RAID © 2003 Apple Computer, Inc. All rights reserved.
Overview Xserve RAID is a storage system that provides high-performance, scalable data access and management. It was designed to work with Xserve but is also compatible with desktop computers back to the Power Mac G4 (Digital Audio), as long as the computer has system software OS X (version 10.2.3 or later). A host adapter card must be installed in these computers to allow connection to the Xserve RAID system.
Features Key features of Xserve RAID include: • 3U enclosure (5.
Quick-Swap Modules Several modules can be easily replaced in Xserve RAID without removing the system from its rack. Most of these modules are both redundant and hot-swappable.
Power Supplies Xserve RAID includes two redundant power supplies, each with an AC power connection. When one power supply is not operational, the other provides power for the entire system. You can replace or install a power supply while the system is running. If one power supply is removed from the system, it must be reinstalled or replaced with a working one as soon as possible to prevent the drive modules from overheating. Cooling modules Xserve RAID includes two redundant cooling modules.
Ports The standard configuration of Xserve RAID includes the following ports on the back panel: two 2-gigabit copper fibre channel ports, two gigabit Ethernet ports, and two ports for uninterruptible power supply (UPS) management. System administrators or service providers can connect a laptop computer or terminal to the Ethernet ports and then use command-line tools to change settings on the server. Note: For a diagram of the ports location, see “Back Panel” in the Views chapter.
Service Source Take Apart Xserve RAID © 2003 Apple Computer, Inc. All rights reserved.
General Information Tools No tools are required for removing or installing the following parts: hard drive, power supply, cooling module, controller module, and backup battery. Other parts require only a Phillips screwdriver. If the system is locked, you will also need the Allen wrench key that came with the system.
Hard Drive Module Xserve RAID includes fourteen hard drive bays at the front of the system. Drives come as modules attached to carriers; they are removed from or installed in the system as a unit. Note: Blank drive carriers, which may fill some of the hard drive bays, follow the same take-apart procedure as hard drives. If you are replacing a blank carrier with a drive module, instruct the system’s administrator to keep the blank for possible future use.
Procedure 1. Make sure the drive being replaced is not in use by any application and that removing it will not disrupt the RAID scheme in use. 2. Press the handle on the front of the drive module so that the handle pops out. 3. Wait for the right LED on the drive to go out. Then grasp the drive handle, and pull the drive module out of the system. Important:To maintain proper airflow, do not leave a drive bay empty. If you permanently remove a drive, replace it with a blank drive module.
Power Supply Xserve RAID includes two redundant power supplies. When one power supply is not operational, the other provides power for the entire system. Tools No tools are required for this procedure. Preliminary Steps No preliminary steps are required. You can replace or install a power supply while the system is running; you do not need to shut down or open Xserve RAID first.
Procedure 1. For the power supply you want to replace, unplug the power cord from the power source. 2. Lift the clip that holds the power cord in place and remove the cord from the back of the power supply. 3. Grasp the handle at the top of the power supply and pull down to unlock it. Then holding the handle, pull the power supply straight out the back of the system. Warning: Do not reach inside the system when removing a power supply or when the power supply is out of the system.
Cooling module Xserve RAID includes two redundant cooling modules. If one cooling module is not operational, the other provides cooling for the entire system. Tools No tools are required for this procedure. Preliminary Steps No preliminary steps are required. You can replace or install a cooling module while the system is running; you do not need to shut down or open Xserve RAID first.
Procedure 1. Press apart the two latches on the back of the cooling module. 2. Holding the cooling module by the latches, pull it straight out the back of the Xserve RAID enclosure. Important: When you remove a cooling module from the system, be sure to replace it with a working cooling module as soon as possible to prevent the system from overheating.
Controller Module Xserve RAID includes two controller modules. The top controller manages the seven drive modules on the system’s left side (viewed from the front of the system); the bottom controller manages the seven drive modules on the right. The controller module consists of the controller card, processor, and memory. This procedure explains how to remove the controller module from the enclosure and how to open the module’s case to access the controller card.
Procedure 1. Press apart the two latches on the back of the controller module. 2. Holding the controller module by the latches, pull it straight back out of the enclosure. 3. If you are removing the controller card from the case, remove the two screws on the front of the case, and slide out the bottom half of the case. Note: The controller card is attached to the bottom of the controller module case. Do not attempt to separate the card from the bottom case.
Processor The processor sits on the controller card inside the controller module case. Tools The only tools required for this procedure are a Phillips screwdriver and needlenose pliers. Preliminary Steps Before you begin, remove the controller module from the enclosure.
Procedure 1. Remove the two screws on the front of the controller module case. 2. Slide out the bottom half of the case. Note: The controller card is attached to the bottom of the controller module case. Do not attempt to separate the card from the bottom case. 3. Place the controller card on a flat sturdy surface. Using needlenose pliers, compress the two plastic pegs holding the processor in place. Then, holding the processor by the edges, pull it straight up to disconnect it from the controller card.
Memory (DIMMs) The memory DIMM sits on the controller card inside the controller module case. Tools The only tool required for this procedure is a Phillips screwdriver. Preliminary Steps Before you begin, remove the controller module from the enclosure.
Procedure 1. Remove the two screws on the front of the controller module case. 2. Slide out the bottom half of the case. Note: The controller card is attached to the bottom of the controller module case. Do not attempt to separate the card from the bottom case. 3. Release the two latches that hold the memory DIMM in place. 4. Holding the DIMM by the edges, disconnect it from the controller card.
Replacement Note: When installing the DIMM, be sure to insert it at an angle into the DIMM connector. Once the DIMM is connected, rotate it down flush with the controller card until you feel the latches snap into place.
Battery Module Xserve RAID may include up to two optional, redundant backup battery modules, which protect data in the controllers’ cache in the event of a power interruption. The battery module consists of a battery cell, battery recharger board, battery light pipe, and battery cable. This procedure explains how to remove the battery module from the enclosure. Tools No tools are required for this procedure. Preliminary Steps No preliminary steps are required.
Procedure 1. Squeeze together the two latches on the back of the battery module, and holding it by the handle, pull it straight back. 2. Remove the battery module from the Xserve RAID enclosure. Note: When first installed, a new battery module will take several hours to charge completely. The system must be turned on to charge the battery. Important:To maintain proper airflow, do not leave a battery bay empty. If you permanently remove a battery module, replace it with a blank battery cover.
Removing Xserve RAID from the Rack You must remove Xserve RAID from its rack to access all parts except the hard drive, power supply, cooling module, controller module, processor, memory, and backup battery. Important: Due to the weight of the system, do not attempt to lift or move the system without help from another person. Tools The only tool required for this procedure is a Phillips screwdriver. Preliminary Steps See “Before Opening Xserve RAID” at the beginning of this chapter. Procedure 1.
2. With one person supporting each side of the unit, slide the system out of the rack and place it on a sturdy, flat surface covered by an ESD mat. Replacement Note: When reinstalling the system, be sure to slide it all the way into the rack until it engages the small posts at the rear of the L-brackets.
Top Cover You must remove the top cover to access all parts except the hard drive, power supply, cooling module, controller module, processor, memory, and backup battery. Tools The only tool required for this procedure is a Phillips screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat.
Procedure 1. Remove the eight mounting screws on each side of the top cover. 2. Slide the top cover a short distance toward the back of the unit. 3. Lift the top cover off the enclosure.
Locking Switch Tools The only tool required for this procedure is a Phillips screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat. Then remove the top cover.
Procedure 1. Disconnect the locking switch cable from the right front panel board. 2. Remove the two screws that mount the locking switch to the chassis. 3. Remove the locking switch from the bottom housing.
Front Bezel Tools The only tool required for this procedure is a Phillips screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat. Then remove the top cover.
Procedure 1. Disconnect the locking switch cable from the right front panel board. 2. Disconnect the front panel board cable from the left and right front panel boards. 3. Remove the four screws securing the bezel to the bottom housing.
4. Carefully pull the bezel a short distance straight back off the bottom housing, making sure the bezel clears the barrel of the locking mechanism. 5. Disconnect the cable from the center front panel board. 6. Remove the bezel from the housing.
Replacement Warning: When replacing the bezel, make sure you route the two branches of the front panel board cable straight up through the center front opening in the chassis. Otherwise, the front bezel may pinch the cable and damage it.
Midplane Board Tools The only tool required for this procedure is a Phillips screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat.
Procedure 1. Disconnect the front panel board cable and back panel board cables from the midplane board. 2. Grasp the front half of the chassis and rotate 90 degrees up. 3. Remove the six midplane board mounting screws. 4. Remove the midplane from the bottom housing.
Replacement Note: When repositioning the front half of the chassis back into place, make sure the small hole in the center of the chassis fits over the peg in the chassis floor.
Center Front Panel Board Tools The only tool required for this procedure is a Phillips screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat.
Procedure 1. Remove the two mounting screws on the center front panel board. 2. Remove the board from the bezel.
Center Front Light Pipe Tools The only tools required for this procedure are a Phillips screwdriver and a small flat-blade screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat.
Procedure 1. Using a flat-blade screwdriver, carefully pry up the top center light pipe and shield and remove them from the bezel. 2. Remove the bottom light pipe and shield from the bezel.
Left Front Panel Board Tools The only tool required for this procedure is a Phillips screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat. Then remove the top cover.
Procedure 1. Disconnect the front panel board cable from the left front panel board. 2. Remove the mounting screw. 3. Remove the board from the enclosure.
Right Front Panel Board Tools The only tool required for this procedure is a Phillips screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat. Then remove the top cover.
Procedure 1. Disconnect the locking switch cable and the front panel board cable from the right front panel board. 2. Remove the mounting screw. 3. Remove the board from the enclosure.
Left or Right Front Light Pipe Tools The only tools required for this procedure are a Phillips screwdriver and a flat-blade screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat. Then remove the following: • Top cover • Front bezel • Right or left front panel board Note: The same light pipe is used behind both the left and right front panel boards.
Procedure 1. Using a flat-blade screwdriver, carefully pry up the light pipe and shield. 2. Remove the light pipe and shield from the bezel. Replacement Note: The light pipes come with a black plastic shield. Make sure the shield is in correct position over the light pipe before you place the light pipe back into the bezel.
Front Panel Buttons Tools The only tools required for this procedure are a Phillips screwdriver and either a flat-blade screwdriver or needlenose pliers. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat. Then remove the following: • Top cover • Front bezel • Left front panel board Note: The front panel button kit comes with both the system identifier button and the mute button.
Procedure 1. Using needlenose pliers or a flat-blade screwdriver, carefully lift out the button shield from the bezel. 2. Pry up the buttons and remove them from the bezel. Replacement Note: When replacing the buttons, be sure to orient them as illustrated below.
Front Panel Cable Tools The only tool required for this procedure is a Phillips screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat.
Procedure 1. Disconnect the front panel cable from the midplane board. 2. Remove any tape holding the cable to the chassis. 3. Route the cable out through the center opening in the chassis and remove the cable from the enclosure.
Rear Panel Cable Tools The only tool required for this procedure is a Phillips screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat. Then remove the top cover.
Procedure 1. Disconnect the rear panel cable from the midplane board and from the rear power button panel board or rear system ID panel board. 2. Remove the cable from the enclosure.
Rear System ID Panel Board The rear system ID panel board includes the system ID and mute buttons. Tools The only tool required for this procedure is a small Phillips screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat. Then remove the top cover.
Procedure 1. Disconnect the rear panel cable from the rear system ID panel board. 2. Remove the two panel board mounting screws. 3. Remove the rear system ID panel board and its button cover from the enclosure.
Rear Power Button Panel Board The rear power button panel board includes the on/off power button and light. Tools The only tool required for this procedure is a small Phillips screwdriver. Preliminary Steps Before you begin, remove the system from the rack and place it on a sturdy, flat surface and ESD mat. Then remove the top cover.
Procedure 1. Disconnect the rear panel cable from the rear power button panel board. 2. Remove the two panel board mounting screws. 3. Remove the rear power button panel board and its button cover from the enclosure.
Service Source Troubleshooting Xserve RAID © 2003 Apple Computer, Inc. All rights reserved.
Diagnostic Tools Xserve RAID includes built-in sensors that detect and report on hard drives, internal temperature, cooling module status or failure, and power status or failure. You can monitor the system’s operation via these sensors and two diagnostic tools: indicator lights on the front and back of the system and remote monitoring software. Status Lights Status lights are located on the front and back panels of Xserve RAID. In addition, there are status lights on the host adapter card.
Table 1: Front Panel Status Lights Indicator LED Color Description Security lock Yellow Lock is engaged System identifier Yellow Indicates a hardware error or that someone has toggled it on; check the server monitoring application for more information Mute button No LED Press to turn off the alarm signalling an error condition Power supplies Green OK Red Failure (See “Power Supply Status Lights”) Green OK Red Failure Green OK Red Over temperature RAID controller (one for each group
Back Panel Status Lights The system’s back panel status lights are shown in the figure below. General back panel status lights are listed in Table 3. Power supply status lights are in Table 4.
Table 3: Power Supply Status Lights Power Supply Conditions Green LED Yellow LED Red LED No AC power to either power supply Off Off Off Power supply failure or no AC power to this power supply Off Off On AC power present; standby ouputs on Blinking Off Off Power supply DC outputs on and OK On Off Off Current limit On Off Blinking Predictive failure On Blinking/on Off Host Adapter Card Status Lights The host adapter card’s status lights are shown in the figure and table below.
RAID Admin and Disk Utility There are two applications for configuring and monitoring Xserve RAID systems: RAID Admin, included on a CD with the system, and Disk Utility, which is part of Mac OS X or Mac OS X Server.
Info Info reports system name, lock status, controller details, and whether there is a problem or power failure. Components Components shows the operating information about the power supplies, RAID controllers, cooling modules, and cache backup batteries. Clicking the button for a component displays its details.
Drive & Arrays Drives & Arrays shows details of each array, the drives in use, and the drives available. Choosing an array from the Array menu displays its details. Fibre Channel Fibre Channel shows information about each RAID controller and the type of fibre channel connection in use. Network Network displays the IP address and related network details for each RAID controller.
Block Diagram Midplane ATA 100 ATA 100 Control 10/100 Enet Serial ATA 100 EMU 2 ATA 100 RAID Controller 2 2Gb FC ATA 100 (7) ATA 100 Battery V Charge Off Battery 2 Drive Module 14 Power Control ATA 100 Drive Module 13 Drive Module 12 Drive Module 11 Front Button Board Host Activity Display 5V 12V 3.3V 5V sb Power Supply 2 Drive Module 10 Drive Module 9 5V, Fantac Blowers 1&2 Fan Control ATA 100 Drive Module 8 12C EMU 2 5V 12V 3.
Service Source Views Xserve RAID © 2003 Apple Computer, Inc. All rights reserved.
External Views Front Panel Mute Button System Identifier Button and Light Drive Module Lock and Status Llight Power Supply Status Light Cooling System Status Light Temperature Status Light Controller Status Light Host Activity Lights Drive Module Activity and Status Lights Drive Modules Fibre Channel Link Lights External Views Xserve RAID Views - 1
Back Panel Mute Button System Identifier Button and Light Optional Battery Module Bay (2) Controller Status Light RAID Controller Reset Button Cooling Module Status Light Power Button and Light Battery Status Lights Power Supply Status Lights Fibre Channel Port and Status Light (2) Power Supply (2) Power Socket (2) RAID Controller Module and Status Light (2) 2 - Xserve RAID Views Ethernet Port and Status Light (2) UPS Interface Port (2) Cooling Module (2) External Views
