Hardware Maintenance
Copyright © 2004 - 2006 EqualLogic, Inc. September 2006 EqualLogic is a registered trademark of EqualLogic, Inc. All trademarks and registered trademarks mentioned herein are the property of their respective owners. Possession, use, or copying of the documentation or the software described in this publication is authorized only under the license agreement. EqualLogic, Inc. will not be held liable for technical or editorial errors or omissions contained herein.
Table of Contents Preface ..................................................................................................................v Audience ..........................................................................................................v Organization ...................................................................................................vi Conventions ....................................................................................................
PS Series 50E to 400E Hardware Maintenance Table of Contents 5 Maintaining Fan Trays.................................................................................. 5-1 Identifying Fan Tray Failures....................................................................... 5-1 Removing a Fan Tray ................................................................................... 5-1 Installing a Fan Tray.....................................................................................
Preface This manual describes how to maintain the hardware for EqualLogic PS Series 50E to 400E storage arrays. Each array contains hot-swappable fans and power supplies, up to fourteen RAID-protected disks, and single or dual hot-swappable control modules, each with three Gigabit Ethernet interfaces. With one or more PS Series storage arrays, you can create a PS Series group—a self-managing, iSCSI storage area network (SAN) that is affordable and easy to use, regardless of scale.
PS Series 50E to 400E Hardware Maintenance Preface Organization This manual is organized as follows: • Chapter 1, Basic Array Information, describes the PS Series storage array front and back panels, how to interpret LEDs, how to use an electrostatic wrist strap, and how to shut down and restart an array. • Chapter 2, Maintaining Disks, describes how to install and remove disks.
PS Series 50E to 400E Hardware Maintenance Preface Documentation and Technical Support For detailed information about PS Series storage arrays, groups, and volumes, see the following documentation: • Release Notes. Provides the latest information about PS Series storage arrays. • QuickStart. Describes how to set up PS Series 50E to 400E storage array hardware and create a PS Series group. • Group Administration.
PS Series 50E to 400E Hardware Maintenance Preface Warranty Information The PS Series storage array warranty is included in the shipping box. For information about registering a warranty, visit the EqualLogic website, www.equallogic.com. Restricted Access Requirement PS Series storage arrays must be installed in a restricted access location, which is an area that is intended only for qualified or trained personnel.
1 Basic Array Information Basic information about PS Series 50E to 400E storage arrays include: • Front and Back Panels on page 1-1 • Interpreting LEDs on page 1-2 • Using an Electrostatic Wrist Strap on page 1-5 • Shutting Down and Restarting an Array on page 1-6 Front and Back Panels The front and back panels of a PS Series storage array are shown below.
PS Series 50E to 400E Hardware Maintenance Basic Array Information Note: The figures in this manual show Type II control modules (blue face plate), which are functionally equivalent to Type I control modules (dark gray face plate). See Appendix B, Control Module Models, for information. Figure 1-3: Type II Control Module Details Interpreting LEDs The following figures and tables describe PS Series 50E to 400E storage array LEDs, which can alert you to errors and conditions that require your attention.
PS Series 50E to 400E Hardware Maintenance Basic Array Information Table 1-1: Front Panel LED Descriptions (Continued) Array LEDs Color Description PWR Off No power. Green Power. Off No power or normal condition. Red One or more of the following has occurred: • RAIDset is degraded but still functioning. • RAIDset (volume) has lost blocks. • Temperature of a component is near upper limit. • Fan tray fan RPMs exceed upper or lower limit. • Power supply fan has failed.
PS Series 50E to 400E Hardware Maintenance Basic Array Information Figure 1-5: Back Panel LEDs Table 1-2: Back Panel LED Descriptions Control Module LEDs Color Description PWR Off No power. Green Power. Off No power or no error condition. Red Array is starting up or error condition. Off No power. Secondary control module (only Type I). Secondary control module is not synchronized with active control module or error condition (only Type II).
PS Series 50E to 400E Hardware Maintenance Basic Array Information Table 1-2: Back Panel LEDs (Continued) Fan Tray LED Color Description Outside edge of fan tray Off No power. Green Environmental Management Module (EMM) and fans on the fan tray are functioning. Red EMM or a fan on the fan tray has failed. The LED will be temporarily red when the array is first powered on or when the fan tray is installed. Flashing red Fan RPMs exceed upper or lower limit.
PS Series 50E to 400E Hardware Maintenance Basic Array Information Shutting Down and Restarting an Array PS Series 50E to 400E storage arrays include redundant, hot-swappable disks, fan trays, power supplies, and control modules (if a dual control module array). You can remove a redundant component without affecting operation if a functioning component is available. Otherwise, it is recommended that you cleanly shut down the array and turn off power before removing a component.
2 Maintaining Disks PS Series 50E to 400E storage arrays include up to 14 hot-swappable disks. Disk maintenance topics include: • Disk Handling Requirements on page 2-1 • Identifying Failed Disks on page 2-2 • Removing Disks on page 2-2 • Installing Disks on page 2-3 Disk Handling Requirements You must adhere to the following disk handling requirements: • Store disks properly. When not installed in an array, store a disk in the antistatic bag and foam insert in which the disk was shipped.
PS Series 50E to 400E Hardware Maintenance Maintaining Disks Identifying Failed Disks Disks in PS Series 50E to 400E storage arrays are installed in slots numbered from 0 to 13 (from left to right). A disk failure is indicated by: • The disk’s right LED is red and the left LED is off. See Interpreting LEDs on page 1-2. • A message on the console, in the event log, or in the Group Manager GUI Alarms panel describes a disk failure.
PS Series 50E to 400E Hardware Maintenance Maintaining Disks Figure 2-1 shows how to remove a disk from a storage array. Instructions for removing a blank carrier are similar, except you do not have to wait 10 seconds. Figure 2-1: Removing a Disk Installing Disks Before installing a disk or blank carrier in a storage array, attach an electrostatic protection device, as described in Using an Electrostatic Wrist Strap on page 1-5. Notes: You can use disks with different sizes in an array.
PS Series 50E to 400E Hardware Maintenance Maintaining Disks Figure 2-2 shows how to install a disk in an array. Use the same instructions for installing a blank carrier. Note: Make sure the disk is oriented in the position shown below (that is, the locking latch is positioned upwards). Figure 2-2: Installing a Disk Verify that the new disk is operational by checking the LEDs on the front panel, as described in Interpreting LEDs on page 1-2.
3 Maintaining Control Modules PS Series 50E to 400E storage arrays include one control module or two hot-swappable control modules, each with a replaceable compact flash card and battery-backed write cache. Type II control modules also include a replaceable coin cell battery to back up the NVRAM. Warning: Only install control modules of the same type in a PS Series array. A Type II control module has a blue face plate and one serial port.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules • The control module lock must be closed for proper operation. If you open the lock (slide it to the right), it is recommended that you gently pull out (for example, by 0.5 inch) and then re-insert the control module and close the lock. • Do not toggle the control module lock.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules in a redundant pair, you only need to connect a cable to one of the ports. For example, if you connect a cable to the eth0 port on CM0, the eth0 network interface can be used even if CM1 is the active control module (assuming ports are functional). The eth2 port pair is not redundant. The active control module can use the eth2 network interface only if there is a cable connected to the eth2 port on the active control module.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules Group members should run the same firmware version; otherwise, only functionality common to all versions will be available in the group. See the PS Series Release Notes for information about mixed-firmware groups. If you are upgrading to a dual control module array or replacing a failed compact flash card, be sure to order the correct firmware version from EqualLogic.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules • In a dual control module array, to ensure connectivity to the non-redundant eth2 port pair (regardless of which control module is active), connect a cable to the eth2 port on both CM0 and CM1. • In a dual control module array, to enable failover across a redundant port pair (eth0 or eth1) when a port or cable fails, connect cables to both ports. For example, connect a cable to eth0 on CM0 and eth0 on CM1.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules Figure 3-3 shows how you can increase availability and performance by adding network connections to a PS Series 50E to 400E storage array with dual control modules. Note that you can connect all six ports for guaranteed full bandwidth under all conditions.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules • If the cable attached to the eth2 port on the active control module (CM0) is disconnected, only eth0 and eth1 will remain as network connections. This is because the eth2 port is not redundant and does not support port failover. • If the active control module (CM0) fails, CM1 will become the new active control module. After the control module failover, there will be two network connections (eth1 and eth2).
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules To install a control module, attach an electrostatic wrist strap, as described in Using an Electrostatic Wrist Strap on page 1-5. Then, remove the control module from its antistatic bag and refer to the instructions in Figure 3-5. Figure 3-5: Installing a Control Module After installing the control module, connect network cables to the control module, as described in Connecting Network Cables on page 3-4.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules If two control modules are installed but only one appears in the GUI or CLI, a control module may not be properly installed. Re-seat the new control module; be sure to slide the lock completely to the left and push in the handles. If both control modules still do not appear in the GUI or CLI, they may not be running the same firmware version, and you should contact your PS Series array service provider.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules To remove a control module, attach an electrostatic wrist strap (see Using an Electrostatic Wrist Strap on page 1-5) and follow the instructions in Figure 3-6. Note: If you are removing a failed control module for replacement purposes, you must remove the compact flash card from the failed control module, as described in Replacing the Compact Flash Card on page 3-11. Then, install the card in the replacement control module.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules Replacing the Compact Flash Card Each control module includes a compact flash card running the PS Series storage array firmware. You must replace a compact flash card if the card fails on an otherwise functioning control module. Be sure to order a replacement card with the same firmware version as the failed card. See Maintaining Control Module Firmware on page 3-3 for information about identifying firmware.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules 5. Install the control module in the array. See Installing a Control Module on page 3-7. Figure 3-7: Removing and Installing a Compact Flash Card After installing the control module, if the array was shut down, turn on power to the array. To ensure that the control module is operational, check the LEDs on the front panel, as described in Interpreting LEDs on page 1-2.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules policy settings, as described in the PS Series Group Administration manual and summarized here: • On a member with a single control module, if the low-battery-safe policy is enabled and the charge on the cache battery is low, the cache will be flushed and will operate in write-through mode until the cache battery is recharged or replaced.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules To replace a control module cache battery, follow these steps and refer to the specified sections and figures: 1. Attach an electrostatic wrist strap. See Using an Electrostatic Wrist Strap on page 1-5. 2. Remove the affected control module from its slot. See Removing a Control Module on page 3-9. 3. Replace the cache battery, as shown in Figure 3-8. Be sure to properly dispose of the failed battery. 4. Reinstall the control module.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules After installing the control module, if the array was shut down, turn on power to the array. To ensure that the control module is operational, check the LEDs on the front panel, as described in Interpreting LEDs on page 1-2. Also check the GUI Member Controllers window or invoke the CLI member select show controllers command. The cache battery status, shown in the Battery status field, will be good (GUI) or OK (CLI) when fully charged.
PS Series 50E to 400E Hardware Maintenance Maintaining Control Modules module array without shutting down the array, if the remaining control module has at least one connected and functioning network interface. However, if you remove the active control module (the LED labeled ACT will be green), there will be a short interruption as failover to the secondary control module occurs.
4 Maintaining Power Supplies PS Series 50E to 400E storage arrays contain either two Model 20-0002 power supplies or two Model 20-0005 power supplies. Warnings: Do not mix power supply types in an array or you risk losing data. Power cables shipped with the array should only be used with this product.
PS Series 50E to 400E Hardware Maintenance Maintaining Power Supplies To identify the model number, examine the power supply face plate. Table 4-1 shows the power supply face plates and their corresponding model numbers. Table 4-1: Power Supply Model Numbers Face Plate Model Number 20-0002 20-0005 Removing a Power Supply If a power supply fails, you must replace it as soon as possible. Each array includes two hot-swappable power supplies.
PS Series 50E to 400E Hardware Maintenance Maintaining Power Supplies Figure 4-1: Removing a Power Supply Installing a Power Supply To install a power supply, refer to Figure 4-1 and follow these steps: 1. Ensure that you have the right power supply model, as described in Identifying the Power Supply Model on page 4-1. 2. Slide the new power supply into the chassis slot. 3. Re-attach the power supply to the chassis, using the two screws on the power supply. 4.
5 Maintaining Fan Trays PS Series 50E to 400E storage arrays include two hot-swappable fan trays, each with two fans. Fan tray maintenance topics include the following: • Identifying Fan Tray Failures on page 5-1 • Removing a Fan Tray on page 5-1 • Installing a Fan Tray on page 5-2 Identifying Fan Tray Failures A failure on a fan tray can be indicated by the following: • Fan tray LED is red. See Interpreting LEDs on page 1-2.
PS Series 50E to 400E Hardware Maintenance Maintaining Fan Trays Figure 5-1 shows how to remove a fan tray from an array. Caution: The fans may still be rotating after the fan tray is removed, so handle the exposed fan tray with care. Figure 5-1: Removing a Fan Tray Installing a Fan Tray To install a fan tray in an array, refer to Figure 5-1 and follow these steps: 1. Slide the new fan tray completely into the chassis slot. Be sure to orient the handle correctly.
A Environmental, Power, and Physical Requirements Table A-1 describes the environmental, power, and physical requirements for PS Series 50E to 400E storage arrays. Table A-1: Storage Array Requirements Component Requirement Weight of fully-loaded array (14 disks and two control modules) 92 pounds or 41.
B Control Module Models PS Series Firmware Version 2.2 and later firmware versions support the Type II control module for PS Series 50E to 400E storage arrays. This control module is functionally equivalent to a Type I control module, but has a few physical differences, as described in this appendix. Warning: You cannot install different control module types in a PS Series storage array. However, a PS Series group can include arrays with different control modules.
PS Series 50E to 400E Hardware Maintenance Control Module Models Model Differences Type I and Type II control module models have equivalent functionality and design, with these exceptions: • Type II can only run PS Series Firmware Version 2.2 or a higher firmware version. Type I supports all firmware versions. • Type II has a single serial port (Port 0). Type I has two serial ports (Port 0 and Port 1).
PS Series 50E to 400E Hardware Maintenance Control Module Models Figure B-3: Serial Connection to a Type II Control Module Figure B-4: Serial Connection to a Type I Control Module B–3
Index A C array back panel 1-1 battery, cache 3-12 battery, coin cell 3-15 control module models B-1 control module restriction 3-7 control modules 3-1 disks 2-1 environmental requirements A-1 fan trays 5-1 firmware 3-3 front panel 1-1 LEDs 1-2 power supplies 4-1 protecting from discharge 1-5 serial connection B-2 shutdown procedure 1-6 cables (network) connecting 3-4 copper-based networks 3-4 fibre optic networks 3-4 B battery, cache charging 3-9, 3-15 monitoring charge 3-13 protecting 3-13 replacing 3
PS Series 50E to 400E Hardware Maintenance model differences B-2 port redundancy 3-2 protecting 3-1 removing from array 3-9 restriction 3-1, 3-7 serial connection B-2 synchronizing 1-4, 3-1 toggling lock prohibition 3-2 verifying operational status 3-8 copper-based networks, cables 3-4 D disks failure behavior 2-2 failure indications 2-2 handling requirements 2-1 installing in array 2-4 locating 2-2 protecting 2-1 removing from array 2-2 verifying operational status 2-4 E electrostatic protection device
PS Series 50E to 400E Hardware Maintenance model restriction 4-1 removing from array 4-2 verifying operational status 4-3 R requirements cache battery 3-13 coin cell battery 3-15 control modules 3-1 environmental A-1 firmware 3-3 handling disks 2-1 network 3-4 physical A-1 power A-1 power supplies 4-1 Index S serial connection, making 1-6, B-2 shutting down an array 1-6 synchronizing control modules 1-4, 3-1 U upgrading to a dual control module array 3-3 W wrist strap, using for protection 1-5 write
