HP StorageWorks P4000 Series User manual

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

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Acknowledgements
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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
4

Tables
Troubleshooting the HP StorageWorks P4000 SRA ...................................................... 101
Document conventions ............................................................................................. 122
P4000 SRA for VMware SRM user guide 5

6

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