Hardware Maintenance Copyright 2009 Dell, Inc. All rights reserved. Dell is a trademark of Dell, Inc. EqualLogic is a registered trademark. All trademarks and registered trademarks mentioned herein are the property of their respective owners. Information in this document is subject to change without notice. Reproduction in any manner whatsoever without the written permission of Dell is strictly forbidden.
Table of Contents Preface ..................................................................................................................v Audience ..........................................................................................................v Organization ....................................................................................................v Documentation ...............................................................................................
PS4000 Hardware Maintenance Table of Contents Replacing a Micro SD Card................................................................. 3-18 4 Maintaining Power Supply Modules............................................................ 4-1 Interpreting the LEDs................................................................................... 4-1 Identifying Failures ...................................................................................... 4-1 Removing a Power Supply and Cooling Module......
Preface This manual describes how to maintain the hardware for PS4000 storage arrays. Each array contains hot-swappable power supply and cooling modules, eight or sixteen RAID-protected disks, and single or dual hot-swappable control modules. With one or more PS Series arrays, you can create a PS Series group—a selfmanaging, iSCSI storage area network (SAN) that is affordable and easy to use, regardless of scale.
PS4000 Hardware Maintenance Preface • Chapter 4, Maintaining Power Supply Modules, describes how to install and remove the modules that provide power and cooling to the array. • Appendix A, Environmental, Power, and Other Specifications, describes the specifications for a PS4000 array. Documentation For detailed information about PS Series arrays, groups, and volumes, see the following documentation: • PS Series Release Notes. Provides the latest information about PS Series arrays.
PS4000 Hardware Maintenance Preface Technical Support and Customer Service Dell’s support service is available to answer your questions about PS Series arrays. If you have an Express Service Code, have it ready when you call. The code helps Dell’s automated-support telephone system direct your call more efficiently. Contacting Dell Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services may not be available in your area.
PS4000 Hardware Maintenance • www.dell.com/la (Latin American countries) • www.dell.ca (Canada only) Preface You can access Dell Support through the following websites: • support.dell.com • support.dell.com/EqualLogic • support.jp.dell.com (Japan only) • support.euro.dell.com (Europe only) Warranty Information The PS4000 array warranty is included in the shipping box. For information about registering a warranty, visit support.dell.com/EqualLogic.
1 Basic Storage Array Information This chapter includes basic information about PS4000 storage arrays. Array Front and Back Panels The front of a PS4000 array is shown in Figure 1-1 and Figure 1-2. Figure 1-1: PS4000 Front Panel (with Bezel) Figure 1-2: PS4000 Front Panel (without Bezel) The disk drives are accessible from the front, after you remove the bezel. See Chapter 2 for detailed information about disk drives.
PS4000 Hardware Maintenance Basic Array Information Figure 1-3: PS4000 Back Panel Table 1-1: Back Panel Detail Description Item Description Power supply and cooling modules. The module on the right is 0, and the module on the left is 1. Control modules. The module on the right is 0, and the module on the left is 1. Operation panel LED. Includes LEDs that show the status of the array (error and warning conditions), power status, and location. Power switches on the power supply and cooling modules.
PS4000 Hardware Maintenance Basic Array Information For information about other array LEDs, see Interpreting Disk Drive LEDs on page 2-3, Interpreting Control Module LEDs on page 3-2, and Interpreting the LEDs on page 4-1. Figure 1-4: Operations Panel Table 1-2: Operations Panel Descriptions Item Power LED Status Description Off No power. Green Power. Off No power or normal condition. Array locator Flashing orange Administrator enabled the array locator function. LED N/A Not used.
PS4000 Hardware Maintenance Basic Array Information Table 1-2: Operations Panel Descriptions (Continued) Item Warning condition LED Status Description Off No power or normal condition. Flashing orange One or more of the following has occurred: • RAID set is degraded but still functioning. • RAID set (volume level) has lost blocks. • Component temperature is near a limit. • Fan failed or fan RPMs exceed limit. • Power supply is not installed or has no power.
PS4000 Hardware Maintenance Basic Array Information Table 1-2: Operations Panel Descriptions (Continued) Item Status Description N/A This label contains the serial number for your array. If you contact your PS Series support provider, you may need to provide this number. Serial number label Using an Electrostatic Wrist Strap When handling the array chassis, disk drives, or control modules, you must use an electrostatic protection device to prevent electrostatic discharge.
PS4000 Hardware Maintenance • Basic Array Information Use the null modem cable shipped with the array to connect to Serial Port 0 on the active control module (ACT LED is green) to a console or a computer running a terminal emulator. Make sure the serial line characteristics are as follows: - 9600 baud One STOP bit No parity 8 data bits No flow control 2. Log in to an account with read-write access, such as the grpadmin account. 3. Enter the shutdown command, as shown next.
2 Maintaining Disk Drives The array includes up to 16 hot-swappable disk drives, either Serial Attached SCSI (SAS) or Serial ATA (SATA). Disk drive maintenance topics apply to both SAS and SATA disk drives. Removing the Bezel To access the disk drives, you must remove the bezel. The bezel comes with a lock, which helps protect the disk drives from being tampered with or accidentally removed. To unlock and remove the bezel: 1. Insert the bezel key and turn it clockwise to unlock the bezel. See Figure 2-1.
PS4000 Hardware Maintenance Maintaining Disks Figure 2-2: Pushing Up the Bezel Release Latch 3. Hold the bezel and pull it away from the chassis. See Figure 2-3.
PS4000 Hardware Maintenance Maintaining Disks Interpreting Disk Drive LEDs Figure 2-4 shows how disk drives are oriented and numbered in the array. Figure 2-4: Disk Drive Numbering The parts of a disk drive are shown in Figure 2-5 and described in Table 2-1. Figure 2-5: Disk Drive Detail Table 2-1: Disk Drive Detail Descriptions Callout Item Color Description Disk drive handle release button Black SAS disk drive. Gray SATA disk drive. Handle Gray Same for SAS and SATA disk drives.
PS4000 Hardware Maintenance Maintaining Disks Table 2-1: Disk Drive Detail Descriptions (Continued) Callout Item Color Description Error LED Off No power or normal condition. Red Error condition. Disk Drive Handling Requirements Handle disk drives as follows: • Store drives properly. Store replacement disk drives in the packaging in which they were shipped. Do not stack disk drives or place anything on top of a disk drive. • Protect disk drives from electrostatic discharge.
PS4000 Hardware Maintenance • Maintaining Disks The GUI Member Disks window or the CLI member select show disks command shows a disk drive failure. Array Behavior When a Disk Drive Fails How an array handles a disk drive failure depends on whether a spare disk drive is available and whether the RAIDset containing the failed disk drive is degraded. For example: • If a spare disk drive is available, it replaces the failed disk drive. Performance is normal after reconstruction completes.
PS4000 Hardware Maintenance Maintaining Disks To remove a disk drive: 1. Press the handle release button to the left, in the direction of the arrow, to disangage the handle. 2. Grasp the handle and pull the disk drive 2.5 cm (1 inch) from the slot. See Figure 2-6. Figure 2-6: Removing a Disk Drive 3. Wait 30 seconds to allow the heads to land. (Does not apply when removing a blank carrier.) 4. Pull the disk drive further from the slot and re-engage the handle. You will hear a click.
PS4000 Hardware Maintenance Maintaining Disks Disk Drive Installation Guidelines and Restrictions • Install only disk drives of the same type, speed, and spin rate in an array. The color of the handle release button indicates the disk drive type (black for SAS; gray for SATA). • Make sure the disk drive is oriented in the position shown in Figure 2-4, with the handle release button to the left. • You can use disk drives with different sizes in an array.
PS4000 Hardware Maintenance Maintaining Disks 2. Press the handle release button to release the handle. Open the handle. 3. With the handle at an angle, slide the disk drive completely into the slot, simultaneously pushing in the handle until you hear a click. See Figure 2-7. Figure 2-7: Closing the Disk Drive Handle Verify that the new disk drive is operational by examining the LEDs on the front panel, as described in Interpreting Disk Drive LEDs on page 2-3.
PS4000 Hardware Maintenance Maintaining Disks 2. Push the bezel toward the chassis until the left side of the bezel engages with the chassis. 3. Insert the bezel key and turn it counter-clockwise to lock the bezel. 4. Store the key in a safe place.
3 Maintaining Control Modules A PS4000 array includes one or two hot-swappable control modules. One functioning control module is required for array operation. You access control modules from the rear of the array. Control Modules A PS4000 array includes either two Type 8 or two Type 9 control modules.See Figure 3-1 and Figure 3-2.
PS4000 Hardware Maintenance Maintaining Control Modules module. If the active control module fails, the secondary will take over network operations. Do not mix control module types in an array. Always make sure both control modules are the same type and color. See the latest PS Series Release Notes for information about other supported control modules.
PS4000 Hardware Maintenance Maintaining Control Modules Table 3-2: Ethernet Port LED Descriptions LED Location Color Description Left side of each port Off No power or not connected to network. Green Connected to network. Right side of each port Off No power, not transmitting, or not receiving. Green Transmitting or receiving. Identifying Control Module Failures You can identify a failure in a control module by: • LEDs. See Interpreting Control Module LEDs on page 3-2. • Messages.
PS4000 Hardware Maintenance Maintaining Control Modules A PS series array provides two types of network failure protection: • Network connection failover. If multiple network interfaces are configured and one network interface fails, iSCSI initiators that were connected to the failed interface can reconnect to the group IP address and be redirected to a functioning interface.
PS4000 Hardware Maintenance Maintaining Control Modules Network Configuration Recommendations Dell recommends that you follow the guidelines in Table 3-3. In addition, all the usual rules for proper network configuration apply to group members. General network configuration is beyond the scope of this manual.
PS4000 Hardware Maintenance Maintaining Control Modules Table 3-3: Network Recommendations (Continued) Recommendation Description No STP functionality on switch ports that connect end nodes If possible, do not use Spanning-Tree (STP) on switch ports that connect end nodes (iSCSI initiators or storage array network interfaces).
PS4000 Hardware Maintenance Maintaining Control Modules Connect cables to network interfaces as follows: • For copper-based networks, use Category 5E or Category 6 cables with RJ45 connectors. Use Category 5 cables if they meet the TIA/EIA TSB95 standard. • Connect the interfaces in numeric order, always starting with Ethernet 0. • Connect the interfaces to different network switches.
PS4000 Hardware Maintenance Maintaining Control Modules example, if the network cable connected to the active control module is disconnected). Figure 3-4 shows the minimum network configuration for a dual control module array. Cables are connected to Ethernet 0 on both control modules.
PS4000 Hardware Maintenance Maintaining Control Modules Figure 3-5: Recommended Network Configuration Control Module Handling Requirements Follow these control module handling requirements: • Protect control modules from electrostatic discharge. Always wear an electrostatic wrist strap when handling a control module, as described in Using an Electrostatic Wrist Strap on page 1-5.
PS4000 Hardware Maintenance Maintaining Control Modules You may need to temporarily remove a control module to replace its compact flash or micro SD card. Notes: For proper cooling, do not leave a control module slot empty. If an array will operate for a long time with only one control module, you must install a blank control module in the empty slot. You can order a blank control module from your PS Series array service provider.
PS4000 Hardware Maintenance Maintaining Control Modules Figure 3-6: Opening a Control Module Latch 2. Hold the latches and carefully slide the control module from the slot. See Figure 3-7.
PS4000 Hardware Maintenance Maintaining Control Modules Figure 3-7: Removing a Control Module 3. Place the control module on a flat surface where it will be protected from electrostatic charge. Caution: To avoid damage, do not place anything on top of the control module. 4. If you are replacing a failed control module, remove the compact flash or micro SD card from the failed control module and install it in the replacement control module.
PS4000 Hardware Maintenance Maintaining Control Modules Return the failed control module in the packaging in which the replacement module was shipped. Contact your PS Series support provider for information about returning hardware. Installing a Control Module You can install a control module without shutting down the array. Caution: Do not mix control module types in an array.
PS4000 Hardware Maintenance Maintaining Control Modules Figure 3-9: Installing a Control Module 5. Connect the network cables as described in Connecting Network Cables on page 3-6. 6. If the array was shut down, turn on power to the array. 7. Examine the LEDs, as described in Interpreting Control Module LEDs on page 3-2. Also, check the GUI Member Controllers window or run the CLI member select show controllers command.
PS4000 Hardware Maintenance Maintaining Control Modules charged, as soon as the battery status is good/charging, you can temporarily disable the low-battery-safe policy and force the array to operate in write-back mode. Make sure to re-enable the low-battery-safe policy when the battery is fully charged. See the PS Series Group Administration manual for information about cache policies.
PS4000 Hardware Maintenance Maintaining Control Modules Replacing a Compact Flash Card 1. Firmly grasp the sides of the card and slide it from the connector. Make sure not to damage the card or the control module circuit board. See Figure 3-10. Figure 3-10: Removing a Compact Flash Card 2. To insert the compact flash card in the replacement control module, align the grooves on the sides of the card with the connector, making sure the red arrow on the card is pointing towards the connector.
PS4000 Hardware Maintenance Maintaining Control Modules Figure 3-11: Inserting a Compact Flash Card 3. Firmly press the compact flash card into place. 4. Install the control module. See Installing a Control Module on page 3-13.
PS4000 Hardware Maintenance Maintaining Control Modules Replacing a Micro SD Card 1. Firmly push the card into its housing to release the spring mechanism (Figure 3-12). The micro SD card will be partially ejected from the housing. Figure 3-12: Ejecting the Micro SD Card 2. Gently pull the card straight out of the housing. 3. Place the micro SD card on a flat surface where it will be protected from electrostatic charge. 4.
PS4000 Hardware Maintenance Maintaining Control Modules 5. Firmly press the card into the housing until it clicks into place. Make sure you cannot pull it out. Figure 3-13: Inserting the Micro SD Card 6. Install the control module. See Installing a Control Module on page 3-13. After you replace the micro SD card, make sure the control module is operational. See Interpreting Control Module LEDs on page 3-2.
4 Maintaining Power Supply Modules The array includes two hot-swappable, combination power supply and cooling modules. Interpreting the LEDs Use the power supply and cooling module LEDs, shown in Figure 4-1 and described in Table 4-1, to determine the module status and identify problems. The power supply and cooling module LEDs show the power, fan, and array status.
PS4000 Hardware Maintenance • Maintaining Power Supply Modules Group Manager GUI and CLI output. The GUI Member Enclosure window or the CLI member select show enclosure command shows a power supply and cooling module failure. Note: When viewing the rear of the array, power supply 0 is on the right, and power supply 1 is on the left. See Figure 1-3 on page 1-2 for details.
PS4000 Hardware Maintenance Maintaining Power Supply Modules Figure 4-2: Releasing the Handle 4. Hold the handle and pull the module from the slot. See Figure 4-3. Caution: The module is heavy; support it with two hands.
PS4000 Hardware Maintenance Maintaining Power Supply Modules Installing a Power Supply and Cooling Module Caution: The module is heavy; support it with two hands. To install a power supply and cooling module in an array: 1. Attach an electrostatic wrist strap, as described in Using an Electrostatic Wrist Strap on page 1-5. 2. Refer back to Figure 4-2. Squeeze the latches inward (callout 1) to release the handle and then rotate the handle upward (callout 2). 3.
PS4000 Hardware Maintenance Maintaining Power Supply Modules 6. Use the cable strain relief to secure the power cable to the array, as shown in Figure 4-5. Note: If you need to reverse the cable strain relief wire for your power cable configuration, press the wire ends together as shown in Figure 4-5 to disengage the wire from the power plug socket. Reverse the wire and reattach it to the socket. Figure 4-5: Using the Cable Strain Relief 7. Turn on power to the power supply and cooling module.
PS4000 Hardware Maintenance Maintaining Power Supply Modules module initialization can take from one to ten seconds. When complete, the power LED is green and an event message states that fans have returned to their normal speed.
A Environmental, Power, and Other Specifications Table A-2 describes the environmental, power, and physical specifications for a PS4000 array. Table A-2: PS4000 Array Specifications Component Requirement Weight of fully-loaded array 35 kg (77.
Index A array back panel 1-2 batteries 3-1 control module restriction 3-13 control modules 3-1 cooling 4-1 disk types 2-3 environmental requirements A-1 failure indications 1-2 fans 4-1 firmware 3-4 front panel 1-1 LEDs 1-2, 2-3, 3-2, 4-1 minimum network configuration 3-6 network connection guidelines 3-5 power supplies 4-1 protecting from discharge 1-5 serial number 1-2, 1-5 shutdown procedure 1-5 specifications A-1 B batteries charging 3-14 servicing 3-1 C cable strain relief, using 4-5 cables (network)
PS4000 Hardware Maintenance verifying operational status 2-8 E electrostatic protection, using 1-5 environmental requirements A-1 F failover control module 3-3, 3-4 network connection 3-4 failure indications array 1-2 control modules 3-3 cooling 4-1 disks 2-4 power 4-1 fans failure indications 4-1 initialization 4-5 installing module in array 4-4 LEDs 4-1 locating modules 4-2 maintaining 4-1 removing module from array 4-2 verifying operational status 4-5 firmware identifying 3-4 requirements 3-4, 3-15 Fl
PS4000 Hardware Maintenance power cables restriction 4-4 power supplies cable strain relief 4-5 indications of failure 4-1 initialization 4-5 installing module in array 4-4 LEDs 4-1 locating modules 4-2 maintaining 4-1 removing module from array 4-2 verifying operational status 4-5 R requirements array handling 1-5 control modules 3-9 cooling 4-2 disks 2-4 environmental A-1 firmware 3-4 network 3-6 physical A-1 power 4-2 power cables 4-4 S SAS disks identifying 2-3 Index supported control module 3-1 SA