Failover Recovery - HP StorageWorks XP10000 - Disk Array Administrator's Manual

Adapter to unpresent and delete the point-in-time copies. XP Business Copy or XP Snapshot is used
to create point-in-time copies during recovery plan testing.
NOTE:
For Failover, the ESX LVM settings must be set to default for point-in-time copies (default is disallow)
and resignature (default is allow).
The failover testing sequence is:
SRM makes a request to XP Virtualization Adapter to do test failover to replicated LUNs on a remote
(recovery) array.
XP Virtualization Adapter connects to an XP RAID Manager instance and the Ids of all replicated
point-in-time copy SVOLs on the recovery array.
XP Virtualization Adapter looks for and checks that the point-in-time copy SVOLs are members of
data replication groups, and then makes them read and write SVOLs.
XP Virtualization Adapter provides information and performs failover operations for nondisruptive
testing of SRM failover recovery plans, and returns the following information:
Replicated Key and point-in-time copy SVOLs and Ids: LDEV number and LUN WWN
CT group IDs for Replicated LUNs
SRM maps LUNs with datastores using the replicated Keys and LUN WWN.
SRM verifies the point-in-time copy SVOLs can be recovered after failure of the local array (via a
recovery plan). SRM uses XP Virtualization Adapter to unpresent and delete the point-in-time copies.
NOTE:
For failover testing, the point-in-time copy SVOLs must be created as PAIR state, and must be
registered to horcm.conf as a group.

Failover recovery

During recovery, SRM executes a recovery plan. When SRM reaches the Prepare Storage step in the
recovery plan, it provides the LUN information needed for failover to XP Virtualization Adapter. The
failover sequence is:
SRM makes a request to XP Virtualization Adapter to do failover to replicated LUNs on a remote
(recovery) array.
XP Virtualization Adapter connects to an XP RAID Manager instance and requests replicated XP
Continuous Access SVOLs on the recovery array.
XP Virtualization Adapter looks for and checks that XP Continuous Access SVOLs are members of
data replication groups, and then executes horctakeover to make them read and write SVOLs.
XP Virtualization Adapter provides information and performs failover operations defined in SRM
failover recovery plans, and returns the following information:
Replicated Key and XP Continuous Access SVOLs and Ids: LDEV number and LUN WWN
CT group Ids for Replicated LUNs
XP Virtualization Adapter Administrator Guide 7