HP StorageWorks P4000 Series Manuale utente

HP StorageWorks

P4000 SRA for VMware SRM user guide

This guide provides information about the HP StorageWorks P4000 SRA for VMware SRM, which enables full

featured use of the VMware Site Recovery Manager. Combining Remote Copy replication with VMware SRM

provides an automated solution for implementing and testing disaster recovery between geographically separated

sites.

Part Number: AX696-96041

Second edition: November 2010

Legal and notice information

Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211

and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items

are licensed to the U.S. Government under vendor's standard commercial license.

The information contained herein is subject to change without notice. The only warranties for HP products and services are set

forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as

constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

Acknowledgements

Microsoft, Windows, Windows XP, and Windows NT are U.S. registered trademarks of Microsoft Corporation.

Contents

1 Using the HP StorageWorks P4000 SRA for VMware SRM ...................... 7

Overview ................................................................................................................................... 7

Configuring SRA ......................................................................................................................... 7

Installing SRA ............................................................................................................................. 7

How the HP StorageWorks P4000 SRA Works with the SRM ............................................................ 8

Array and volume discovery .................................................................................................. 9

Volumes recognized by the HP StorageWorks P4000 SRA .................................................. 9

Volumes ignored by the HP StorageWorks P4000 SRA ....................................................... 9

Testing failover at the recovery site ......................................................................................... 9

Actual failover at the recovery site ........................................................................................ 10

Troubleshooting the HP StorageWorks P4000 SRA ........................................................................ 10

2 Support and other resources .............................................................. 11

Contacting HP .......................................................................................................................... 11

Subscription service ............................................................................................................ 11

HP Insight Remote Support Software ............................................................................................ 11

New and changed information in this edition ............................................................................... 12

Related information ................................................................................................................... 12

HP websites ....................................................................................................................... 12

Typographic conventions ........................................................................................................... 12

Customer self repair .................................................................................................................. 13

HP product documentation survey ............................................................................................... 14

Glossary ............................................................................................ 15

Index ................................................................................................. 17

P4000 SRA for VMware SRM user guide 3

Figures

Typical SRM configuration with two geographically separate sites ................................... 71

Configuring arrays in SRM ......................................................................................... 82

Tables

Troubleshooting the HP StorageWorks P4000 SRA ...................................................... 101

Document conventions ............................................................................................. 122

P4000 SRA for VMware SRM user guide 5

1 Using the HP StorageWorks P4000 SRA

for VMware SRM

Overview

The HP StorageWorks P4000 SRA for VMware SRM enables full featured use of the VMware Site

Recovery Manager. Combining Remote Copy replication with VMware SRM provides an automated

solution for implementing and testing disaster recovery between geographically separated sites.

Configuring SRA

A typical SRM configuration involves two geographically separated sites with TCP/IP connectivity,

the protection site and the recovery site. The protection site is the site that is being replicated to the

recovery site for disaster recovery. Each site contains a HP StorageWorks P4000 SAN Solution, ESX

servers, a Virtual Center Server, and a SRM server.

Figure 1 Typical SRM configuration with two geographically separate sites

Installing SRA

First install the VMware SRM at each site, and then install the HP StorageWorks P4000 SRA on the

SRM server at each site. Once the HP StorageWorks P4000 SRA is installed, SRM can discover

replicated volumes between sites by configuring arrays in SRM. Configuring HP StorageWorks P4000

SAN Solution arrays in SRM requires the following:

P4000 SRA for VMware SRM user guide 7

•The IP address of the SAN/iQ managers.

•A user name and a password for each site.

NOTE:

This is the HP StorageWorks P4000 SAN user name and password as configured in the CMC.

The user at the recovery site must have full permissions on the management group but can be

limited to read only on all other permissions.

Figure 2 Configuring arrays in SRM

How the HP StorageWorks P4000 SRA Works with the SRM

The HP StorageWorks P4000 SRA performs three main functions for SRM. These functions each

depend on specific configuration information in a HP StorageWorks P4000 SAN Solution management

group.

Using the HP StorageWorks P4000 SRA for VMware SRM8

Array and volume discovery

SRM gets information from the HP StorageWorks P4000 SRA about what volumes are being replicated

by the SAN/iQ software. SRM then compares that list to the volumes it recognizes in a VMware

environment.

For normal SRM operation, a replicated volume needs to have a Remote Copy schedule with completed

remote copies at a different HP StorageWorks P4000 SAN Solution management group under a

remote volume that is not mounted at the remote site. This is a standard HP StorageWorks P4000

SAN Solution Remote Copy configuration.

For instructions on how to configure Remote Copy schedules, see the Remote Copy User Manual

which is installed in the Documentation directory of the HP StorageWorks P4000 Centralized

Management Console program. The same information is available from the online help in the HP

StorageWorks P4000 Centralized Management Console.

Volumes recognized by the HP StorageWorks P4000 SRA

Volumes must be configured with scheduled remote snapshots or they will not be considered for SRM

by the SRA. The HP StorageWorks P4000 SRA recognizes the scheduled remote snapshots as replicated

LUNs for SRM to manage. Volumes that are being remote copied only manually are not updated

consistently enough to be useful for disaster recovery and SRM.

If a volume has scheduled remote snapshots, and you create an ad hoc manual remote snapshot of

that volume, then the HP StorageWorks P4000 SRA will recognize the manual remote snapshot along

with the scheduled remote snapshots. Such ad hoc remote snapshots may be useful to test failover

with a more recent copy than the schedule has, or to push the latest updates to the remote site before

a foreseeable disaster occurs.

Volumes ignored by the HP StorageWorks P4000 SRA

Remote snapshots within the same HP StorageWorks P4000 SAN Solution management group are

ignored. These snapshots are not considered disaster recovery copies since they are usually created

to clone a volume in the HP StorageWorks P4000 SAN Solution, and copies that reside on the same

SAN are not useful for disaster recovery.

Testing failover at the recovery site

SRM performs test failovers at the recovery site when requested. When test failovers are requested,

the HP StorageWorks P4000 SRA will perform the steps listed.

1. Select the replicated volumes.

2. Identify the latest complete Remote Copy snapshot.

3. Delete any temporary writable space on that snapshot to ensure an unedited snapshot is presented

to ESX servers.

4. Configure authentication for ESX servers to directly mount snapshots.

5. When testing stops, to conserve space on the SAN, delete the temporary writable space that

was used during the test.

P4000 SRA for VMware SRM user guide 9

Actual failover at the recovery site

In the event of a disaster, the SRM can perform actual failover when requested to. When actual failover

is requested the HP StorageWorks P4000 SRA will perform the steps listed.

1. Select the replicated volumes.

2. Identify and remove any incomplete remote copies that are in progress and present the most

recent completed Remote Copy as a primary volume.

3. Convert remote volumes into primary volumes and configure authentication for ESX servers to

mount them

If an actual failover does not run completely for any reason, the failover can be called many times to

try to complete the run. If, for example, only one volume failed to restore and that was due to a normal

snapshot being present, the snapshot could be manually deleted and the failover be requested again.

Troubleshooting the HP StorageWorks P4000 SRA

Table 1 Troubleshooting the HP StorageWorks P4000 SRA

SolutionCauseProblem

Install the HP StorageWorks P4000

SRA and restart the VMware Site

Recovery Manager Service.

The HP StorageWorks P4000 SRA might

not be installed or the SRM service has

not restarted since the HP StorageWorks

P4000 SRA was installed.

The HP StorageWorks P4000

SAN array does not appear

in the drop down list of arrays

for SRM.

Create a Remote Copy schedule

for all volumes that are to be man-

aged by SRM.

Volumes are only reported as replicated

to SRM if they have a Remote Copy

schedule.

SRM does not see the volumes

that are replicated.

Create authentication groups for

any CHAP authentication required

on the recovery site before running

test failover or failover.

SRM does not store or pass CHAP pass-

words to the HP StorageWorks P4000

SRA. For CHAP authentication to work,

the authentication group with correct

password must be already configured

on the SAN/iQ management group.

CHAP-authenticated ESX serv-

ers are failing to perform test

failovers or actual failover.

Configure a network that can route

from SRM servers to the HP Stor-

ageWorks P4000 SAN Solution,

and verify the user account con-

figured in SRM.

SRM servers running the HP Storage-

Works P4000 SRA must be able to route

TCP/IP traffic to the SAN that is to be

managed and must have a valid user-

name and password.

The HP StorageWorks P4000

SRA fails to connect to the

SAN.

Do not mount primary and remote

volumes at the same site at the

same time.

Both the primary and remote volume

might be mounted at the same site.

When the HP StorageWorks

P4000 SAN array is dis-

covered, an error message

states there are duplicate

LUNs.

Using the HP StorageWorks P4000 SRA for VMware SRM10

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