Dell PS4110 User manual

PS4110 Storage Arrays
Hardware Owner's Manual
Version 1.0

Copyright 2011-2013 Dell Inc. All rights reserved.
Dell and EqualLogic are trademarks of Dell Inc.
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.
Published February 2013
Part Number: 110-6067-EN-R2

Table of Contents
1 Basic Storage Array Information 1
Notes, Cautions, and Warnings 1
Recommended Tools 1
Chassis Types 2
Array Features 2
Back-Panel Features and Indicators 5
Shutting Down and Restarting an Array 5
2 Maintaining Drives 7
About Drive Types 7
Identifying Failed Drives 7
Interpreting Drive LEDs 8
Array Behavior When a Drive Fails 9
Drive Handling Requirements 9
Drive Installation Guidelines and Restrictions 10
3 Maintaining Control Modules 17
Control Module Features 17
Replacing a Control Module 24
Replacing the MicroSD Card 29
Advanced Networking Options 31
4 Maintaining Power Supply and Cooling Modules 33
About Power Supplies 33
Identifying Power Supply Failures 33
Removing a Power Supply and Cooling Module 35
Installing a Power Supply and Cooling Module 36
5 Troubleshooting Your Array 39
Safety First—For You and Your array 39
Obtaining Technical Support and Customer Service 39
Determining Service Tag Information 40
Obtaining Component Diagnostics 40
Troubleshooting Array Startup Failure 40
Troubleshooting Loss of Communication 40
Troubleshooting Array Connections 40
Troubleshooting External Connections 41
Troubleshooting Power Supply and Cooling Modules 41
Troubleshooting Array Cooling Problems 41
Troubleshooting Control Modules 42
Troubleshooting Hard Drives 42
Index 43
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1 Basic Storage Array Information
This chapter includes information about the location and basic operation of the replaceable components in a
storage array, tools and equipment you will need, protecting hardware from electrostatic discharge, and power
on and off operations.
Notes, Cautions, and Warnings
A NOTE indicates important information that helps you make better use of your system.
A CAUTION indicates potential damage to hardware or loss of data if instructions are not followed.
A WARNING indicates a potential for property damage, personal injury, or death.
Recommended Tools
You will need the following items to perform the procedures in this section:
• Bezel key
• Wrist grounding strap
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Hardware Owner's Manual 1 Basic Storage Array Information
Protecting Hardware
Protect a PS Series array from electrostatic discharge. When handling array hardware, make sure you use an
electrostatic wrist strap or a similar form of protection. To use a wrist strap:
1. Connect the steel snap on the coil cord to the stud on the elastic band. See Figure 1.
Figure 1: Using an Electrostatic Wrist Strap
2. Fit the band closely around your wrist.
3. Connect the band to ground. You can either plug the banana connector into a matching grounded receptacle,
or attach it to the matching alligator clip and connect the clip to a grounded device. Examples of an appro-
priate ground would be an ESD mat or the metal frame of a grounded piece of equipment.
Chassis Types
The PS4110 array is available in two different chassis types:
• A 2U chassis with 24 2.5-inch drives, installed vertically
• A 2U chassis with 12 3.5-inch drives, installed horizontally
Array Features
The array has LEDs and other features on both the front and the back.
The Bezel
The bezel is an optional trim panel that attaches to the front of the array to ensure the physical security of the
array. You must remove the bezel to access and maintain the drives.
The bezel has a label that identifies the array model number.
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Hardware Owner's Manual 1 Basic Storage Array Information
Removing the Bezel
The steps for removing the bezel are the same for all array models.
1. Using the bezel key, unlock the bezel.
2. Holding the bezel, lift the latch on the left side of the bezel and swing the left side away from the array.
3. Lift the right side of the bezel off the right side of the array.
4. Set the bezel aside.
Installing the Bezel
The steps for installing the bezel are the same for all the array models.
1. Hook the right end of the bezel onto the right side of the chassis.
2. Swing the left end of the bezel towards the left side of the chassis.
3. Press the bezel into place until the release latch closes.
4. Using the key provided, lock the bezel and store the key in a safe place.
Figure 2: Installing the Bezel
Front-Panel Features and Indicators
The front of a PS4110, without the bezel, is shown in Figure 3 and Figure 4.
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Hardware Owner's Manual 1 Basic Storage Array Information
Table 1 describes the front panel features.
Figure 3: Front Panel Features and Indicators (3.5-inch Drives)
Figure 4: Front Panel Features and Indicators (2.5-inch Drives)
Table 1: Front Panel Feature Descriptions
Item Indicator Icon Description
1Array status
LED
The array status LED lights when the array power is on.
• Off—No power.
• Steady blue—Array status is OK.
• Slow blinking blue—Array status is Standby mode.
• Blinking blue—Administrator request to identify the array (see the Group
Manager online help).
• Steady amber—Critical status.
• Blinking amber—Warning.
2 Power LED
The power LED is ON when at least one power supply is supplying power to the
array.
• Off—No power, or the array is in Standby mode.
• Steady green—Array has at least one power supply providing power, and
array is not in Standby mode.
3Drive Release
Latch None Enables you to remove a drive from the array.
Note: The LEDs are part of a built-in chassis control panel that is not hot-swappable and can be replaced only
by support personnel. During the array power-up sequence, these LEDs will cycle through different states until
the array is fully started and the active control module has been determined.
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Hardware Owner's Manual 1 Basic Storage Array Information
Back-Panel Features and Indicators
The back of a PS4110 is shown in Figure 5.
Table 2 describes the back panel features.
Figure 5: Back Panel-Features
Table 2: Array Back Panel Features
Item Feature Identifier Description
1 Power switch None The power switch controls the power supply output to the
array. One on each power supply.
2Power supply unit
(PSU)
PSU0 (left)
PSU1 (right)
Power supply and cooling fan module for array.
For more information, see Power Supply LEDs on page 33.
3Control Module CM0 (top)
CM1 (bottom)
The control module provides:
• a data path between the array and the applications using
the storage
• array management functions for your array
4Control Module
Release Lever None Enables you to remove the control module from the array.
Shutting Down and Restarting an Array
A PS Series array includes redundant, hot-swappable drives, power supplies, and control modules (in 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.
Note: When an array is shut down, any volumes with data on the array will be set offline until the array is
successfully restarted. This may affect initiators that are connected to the volumes.
1. Do one of the following:
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Hardware Owner's Manual 1 Basic Storage Array Information
• Use telnet or SSH to connect to a functioning IP address assigned to a network interface on the array.
Do not connect to the group IP address.
• Use the null modem cable shipped with the array to connect to the serial port on the active control mod-
ule (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.
login: grpadmin
Password:
Welcome to Group Manager
Copyright 2001-2011 Dell, Inc.
group1> shutdown
If you are using a serial connection to shut down an array, it is safe to turn off power when the “press any key”
message appears. (Pressing any key will restart both control modules.)
If you are using a network connection, the session will be disconnected before the array is fully shut down.
Confirm that the ACT LED on each control module is off (not lit) before turning off power to the array.
After performing array maintenance, you can turn on power to the array. When the array restart completes, the
member and volumes will be set online.
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