Dell PowerVault Series User manual

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Dell™ PowerVault™ Data Protection
Solution System Recovery Guide

Notes, Notices, and Cautions
NOTE: A NOTE indicates important information that helps you make better use of
your computer.
NOTICE: A NOTICE indicates either potential damage to hardware or loss of data
and tells you how to avoid the problem.
CAUTION: A CAUTION indicates a potential for property damage, personal injury,
or death.
____________________
Information in this document is subject to change without notice.
© 2008 Dell Inc. All rights reserved.
Reproduction of these materials in any manner whatsoever without the written permission of Dell Inc.
is strictly forbidden.
Trademarks used in this text: Dell, the DELL logo, PowerEdge, PowerVault, and Dell OpenManage
are trademarks of Dell Inc.; Microsoft, Windows, SQL Server,and Windows Server are either
trademarks or registered trademarks of Microsoft Corporation in the United States and/or other
countries.
Other trademarks and trade names may be used in this document to refer to either the entities claiming
the marks and names or their products. Dell Inc. disclaims any proprietary interest in trademarks and
trade names other than its own.
August 2008 Rev. A01

Contents 3
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Recovery Solution Map . . . . . . . . . . . . . . . 7
3 Recovering from Disk Failures . . . . . . . . . 9
Detecting and Monitoring Disk Failures . . . . . . . . . 9
RAID Adapter Audible Alarm . . . . . . . . . . . . . 9
OpenManage™ Server Administrator . . . . . . . . 9
Dell OpenManage™ IT Assistant. . . . . . . . . . 10
Replacing Disks . . . . . . . . . . . . . . . . . . . . . 10
Replacing Internal Disks . . . . . . . . . . . . . . 11
Replacing Disks in an External Storage Enclosure. 11
Recovering After a Disk Failure . . . . . . . . . . . . . 11
Single Disk Failure Recovery . . . . . . . . . . . . 11
Multiple Disk Failure Recovery . . . . . . . . . . . 13
4 Operating System Reinstallation . . . . . . . 15
Using the Dell Systems Build and Update Utility . . . . 15
BIOS, Firmware and Driver Updates . . . . . . . . . . 24
OS Updates Using Windows Update . . . . . . . . . . 24
Localizing the Operating System . . . . . . . . . . . . 24

4Contents
Installing Multilingual User Interface Pack. . . . . 24
Applying the MUI Language: . . . . . . . . . . . . 25
5 OMSA Reinstallation . . . . . . . . . . . . . . . 27
6 DPM Reinstallation . . . . . . . . . . . . . . . . 29
Prerequisite Software and Network Configuration
Requirements . . . . . . . . . . . . . . . . . . . . 29
Virtual Disk Configuration for the DPM
Storage Pool . . . . . . . . . . . . . . . . . . . . 31
DPM Installation . . . . . . . . . . . . . . . . . . 31
DPM Updates . . . . . . . . . . . . . . . . . . . . 34
7 PowerVault Data Protection Solution
Configuration Wizard Reinstallation . . . . 35
Installing the Wizard. . . . . . . . . . . . . . . . . . . 35
Running the Wizard . . . . . . . . . . . . . . . . . . . 35
8 Recovering DPM Databases and Replicas 37
9 Other Documents and Resources . . . . . 39
Microsoft Information . . . . . . . . . . . . . . . . . . 39
Dell Hardware Information . . . . . . . . . . . . . . . 39
Dell Software Information . . . . . . . . . . . . . . . . 39

Introduction 5
Introduction
This document describes the steps necessary to recover your Dell™
PowerVault™ Data Protection Solution from a number of hardware or
software failures. Depending on the type of failure, you experience, you may
need to:
• Recover from disk failures
• Reinstall the operating system
• Reinstall Dell™ OpenManage™ system management applications
• Reinstall the Data Protection Solution Configuration Wizard
• Reinstall Microsoft
®
System Center Data Protection Manager
(DPM) 2007
• Recover the DPM server's recovery point data
NOTE: Prior to performing the recovery steps in this document, review the Dell
PowerVault Data Protection Solution Information Update for the latest information.
NOTE: For documents and recovery media referenced in this guide, see the Dell
PowerVault Data Protection Solution Quick Reference Guide at support.dell.com.

6Introduction

Recovery Solution Map 7
Recovery Solution Map
This document is comprised of sections describing specific recovery topics
and procedures. Table 2-1 shows how each failure type potentially affects the
various DPM components, and which section in this document is applicable
to the specific failure type.
As you explore different failure/recovery scenarios, keep the following
guidelines in mind:
• Re-installation of the operating system usually requires you to reinstall all
of the applications on your system.
• A non-recoverable failure of the RAID group containing the operating
system will require reinstallation of the operating system and all
applications
• A non-recoverable failure of the RAID group containing one or more DPM
replicas requires restoration of the replicas on that RAID group from tape,
or a secondary DPM server.

8Recovery Solution Map
Table 2-1. Recovery Solution Map
Potentially Affected System Components
Failure Type RAID
Group
Operating
System
OMSA DPM
Application
Wizard DPM DB
or
Replicas
Use the
following
sections to
resolve these
issues. (See
the section
titles below
Table 2-1.)
Operating
System XX XXX
4, 5, 6, 7, 8
OMSA
Application X5
DPM Application XX
6, 8
Data Protection
Solution
Configuration
Wizard
X7
DPM DB or
Replicas X8
OS/DPM
Application RAID
Group
XXX XXX
3, 4, 5, 6, 7, 8
DPM Replica
RAID Group XX
3, 8
Section Title
3Recovering from Disk Failures
4Operating System Reinstallation
5OpenManage Server Administrator Reinstallation
6Data Protection Manager Reinstallation
7Dell PowerVault Data Protection Solution
Configuration Wizard Reinstallation
8Recovering DPM Databases and Replicas

Recovering From Disk Failures 9
Recovering from Disk Failures
Your system's internal disk storage has been pre-configured as RAID 5.
Additionally, as described in the Dell PowerVault Data Protection Solution
Storage Expansion Guide, any additional disks you add to your system will be
configured as RAID 5.
RAID 5 provides uninterrupted operation of your system in the event a single
disk drive in the group fails. However, until the failed disk drive has been
replaced, your system will operate in degraded state. During this degraded
state, another disk failure within the same RAID group will cause loss of all
data in that RAID group. Therefore, it is extremely important to monitor the
status of your system's disks and to replace any failed disk within the same
RAID group as quickly as possible.
Detecting and Monitoring Disk Failures
To optimize the protection of RAID 5-configured storage on your system, it is
essential that you are able to detect hard drive failures immediately as they
occur. Replacing failed disks as soon as possible reduces the risk of unplanned
downtime and loss of critical data.
The following methods can be used to monitor the health of your system's
physical disks.
RAID Adapter Audible Alarm
Refer to the "Enabling the Alarm to Alert in Case of Physical Disk Failures"
section of the Dell™ PowerEdge™ Expandable RAID Controller (PERC) User's
Guide for more information on how to configure the audible alarm. Note that
this feature is not available on all PERC adapters. Refer to your specific
PERC adapter documentation to determine whether this feature is
supported.
OpenManage™ Server Administrator
Dell™ OpenManage™ Server Administrator (OMSA) can monitor the health
of both internal and external disks. Refer to "Replacing Disks" in this chapter
for more information.

10 Recovering From Disk Failures
Figure 3-1 shows how disk status is reported in OMSA.
Figure 3-1. Physical disk status
Dell OpenManage™ IT Assistant
Dell OpenManage™ IT Assistant is a central monitoring console, which can
be used to monitor the status of your Dell systems running OMSA. Refer to
the Dell OpenManage™ IT Assistant User's Guide for more information on
installing and using IT Assistant.
Replacing Disks
When replacing hard drives, only use hard drives included in the Dell
PowerVault Data Protection Solution Support Matrix. Be sure to replace the
failed disk drive with a new disk of the same capacity. Refer to the "Disk Size
Selection and Considerations" section of the Dell PowerVault Data Protection
Solution Storage Expansion Guide for additional details.

Recovering From Disk Failures 11
Replacing Internal Disks
To replace your system's internal disks, refer to the "Hard Drives" and
"Replacing a Hard-Drive Carrier" sections of your system's Hardware Owner's
Manual.
Replacing Disks in an External Storage Enclosure
To replace disk drives in an external Dell storage enclosure, refer to your
storage enclosure's Hardware Owner's Manual.
Recovering After a Disk Failure
This section describes steps you must follow, as well as procedures the system
will automatically perform, after you replace a failed disk. As mentioned
previously, your system will continue to operate if a single disk drive within a
RAID 5 group fails. However, if your system experiences two or more disk
failures in the same RAID group, data loss may result.
Single Disk Failure Recovery
After you replace a failed disk drive within a RAID 5 group, the system will
begin an automatic rebuild of the RAID group. The data on the virtual disks
that reside on the RAID group are still available to your operating system and
your system should run without interruption. Until the rebuild operation
completes, the RAID 5 virtual disks will be running in degraded mode and are
at risk of data loss should an additional disk fail. Using OMSA, you can
monitor the progress and status of the RAID 5 rebuild. If the rebuild does not
begin automatically, refer to the "Rebuild a Failed Physical Disk" section of
the OpenManage™ Server Administrator User's Guide to initiate the rebuild
manually.
Figure 3-2 shows how OMSA reports the status of a rebuilding RAID group.

12 Recovering From Disk Failures
Figure 3-2. Rebuilding a RAID 5 disk group
If you had installed a global hot spare allocated to the same PERC adapter of
the failed disk, the RAID group will automatically switch the role of the failed
disk with the hot-spare disk, and begin the rebuild operation automatically. In
this case, you would need to replace the failed disk and assign it as the new
global hot spare for that PERC adapter. Refer to the "Assign and Unassign
Hot Spares" section of the OpenManage™ Server Administrator's User's Guide
for more information on global hot spares.
About RAID 5 Degraded Mode
When a failed hard drive is replaced, the RAID group begins an automatic
rebuild operation. During this operation, data and parity information is
reallocated across all hard drives in the RAID group. Until the rebuild
completes, performance of the RAID group is degraded. You should continue
to monitor the status of the rebuild to ensure it completes successfully.
NOTE: If another hard drive fails while the RAID group is rebuilding, all data on that
RAID group may be lost.

Recovering From Disk Failures 13
Multiple Disk Failure Recovery
If your system experiences multiple disk failures within the same RAID group
and the RAID group contained your operating system and DPM application,
you must reinstall the operating system and DPM application. If the RAID
group contained the DPM replicas, you can restore the replicas from your
tape archive. Replicas also can be restored from a secondary DPM server,
protecting your primary DPM server. Refer to the "Disaster Recovery" section
of the System Center Data Protection Manager 2007 Operations Guide for
more information on disaster planning DPM recovery procedures.

14 Recovering From Disk Failures

Operating System Reinstallation 15
Operating System Reinstallation
This section describes the process of reinstalling the operating system on your
PowerVault system.
NOTE: Your operating system was pre-installed when you purchased your system.
Only perform the steps in this section if required to repair a non-functioning
operating system.
Using the Dell Systems Build and Update Utility
Use the Dell Systems Build and Update Utility CD that came with your
solution to reinstall the operating system. The Systems Build and Update
Utility installs the operating system software, device drivers, and
OpenManage™ Server Administrator (OMSA) software.
Your system is factory-installed with Microsoft®Windows®Storage
Server®2003 R2 X64 with SP2. The Dell Systems Build and Update Utility
will need the original Microsoft installation media in order to install the
operating system.
NOTE: Using the Dell Systems Build and Update Utility erases all data from the
virtual disk where you are installing the operating system.
To reinstall the operating system, perform the following steps:
1
Connect a keyboard, mouse, and monitor to your system.
2 Power on your system.
3 Insert the Dell Systems Build and Update Utility CD into the system’s
optical drive and configure the BIOS setting to boot off that drive.
4 Reboot the system.
5 After the system boots from the CD, the System Build and Update Utility
screen appears (see Figure 4-1).
6 Select the appropriate language and keyboard type on the left side of the
screen and select the
Server OS Installation option under the Single
Server Solution
section.

16 Operating System Reinstallation
Figure 4-1. System Build and Update Utility
7 Select the date and time, then click Continue .
8 At the Select an Operating System screen, select Microsoft Windows
Server 2003 Service Pack 2 x64 Edition
.
9 Set the Create Utility Partition option to yes , then click Continue .
NOTE: Although you selected Windows Server 2003 in this step, the System Build
and Update Utility will install Windows Storage Server 2003 based on the operating
system media you provide in the following steps.
10 The Configure or Skip RAID window appears. This option will configure
the virtual disk on which the operating system and applications, such as
OMSA and DPM, are installed. Perform the following steps:
a Select Configure RAID , then click Continue (see Figure 4-2).

Operating System Reinstallation 17
Figure 4-2. Configure or Skip RAID Screen
b
On the Create Virtual Disk Express Wizard (Step 1 of 2) screen (see
Figure 4-3), click
Go To Advanced Wizard at the top left corner of the
screen.

18 Operating System Reinstallation
Figure 4-3. Create Virtual Disk Express Wizard (Step 1 of 2)
c
When the Create Virtual Disk Advanced Wizard (Step 1 of 4) screen
appears, select the
RAID-5 option and click Continue .
d In the Create Virtual Disk Advanced Wizard (Step 2 of 4) screen (see
Figure 4-4), select
all the physical disks displayed for Connector 0 by
the internal PERC adapter. Click
Continue .
e Select the Connector 1 button and select all the physical disks
displayed by the PERC adapter. Click
Continue .
NOTE: If you plan to allocate a global hot spare, leave one disk de-selected
for that purpose.

Operating System Reinstallation 19
Figure 4-4. Create Virtual Disk Advanced Wizard (Step 2 of 4)
f
In the Create Virtual Disk Advanced Wizard (Step 3 of 4) screen,
select
50 GB as the size of the virtual disk. Leave all other settings
unchanged and click
Continue .
g When the Create Virtual Disk Advanced Wizard (Step 4 of 4)
summary screen is displayed, verify the information shown and click
Continue .
NOTE: While this screen allows you to assign any unconfigured disks as
dedicated hot spares, assigning dedicated hot spares is not recommended.
Instead, global hot spares are recommended. To learn more about allocating
global hot spares, refer to the "Assign and Unassign Hot Spares" section of the
OpenManage™ Server Administrator's User's Guide.
h
When the pop-up warning is displayed, click OK .
All existing virtual disks on this controller will be deleted at the end of
the interview process and all data will be lost.

20 Operating System Reinstallation
i At the Configure the Physical Disk for Microsoft Windows
Server 2003 Service Pack 2 x64 Edition
screen (see Figure 4-5), select
NTFS as the file system for the boot partition.
j Under Select or enter boot partition size in megabytes , move the
slider to the right
as far as possible to utilize the entire disk for boot
partition. Click
Continue .
Figure 4-5. Configure the Physical Disk for Microsoft Windows Server 2003 Service
Pack 2 x64 Edition
11 At the Network Adapter(s) configuration screen, specify your IP addresses
and netmasks and click
Continue . (Contact your network administrator
for assistance in determining appropriate values to enter.)
12 At the Enter OS Information screen (see Figure 4-6), enter the following
system information:
•
Product ID : Leave blank, since the System Build and Update Utility
will automatically use the product identification (PID) included on
the operating system CD.