Dell PS4110 Manuale utente

PS4110 Storage Arrays

Hardware Owner's Manual

Version 1.0

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
iii

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

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.

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.

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.

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:

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.

Password:

Welcome to Group Manager

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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