HP StorageWorks SAN Virtualization Services Platform Administrator Guide (5697-0934, May 2011)

Figure 39 Recovery tab—VSM in Partial state
After clicking OK, the VSM server reboots itself and comes up as the active VSM. After the
VSM comes up, the VSM uses only the surviving setup virtual disk to synchronize the mirrored
tasks.
3. At the surviving site, for every synchronous mirror group that has a status of Partial, make sure
that the surviving DPM, which will have a status of Present, is the active DPM for that
synchronous mirror group. You can see the status of the DPM on the Data Path Module tab.
If the surviving DPM does not have a status of Present, change the active DPM for the
synchronous mirror group. Right-click the synchronous mirror group, and select Manage >
Manage Data Path Module > Change Active DPM. Make sure that the failover succeeds and
the DPM with a status of Present becomes the active DPM for that synchronous mirror group.
4. At the surviving site, for every failed synchronous mirror group, right-click the mirror group,
and select Manage > Recovery > Force Delete.
The Force Delete option deletes of the synchronous mirror objects on the selected groups. The
local task becomes a simple standalone virtual disk, without permissions, and with PiTs if they
previously existed.
5. Present the virtual disk to the local hosts on the surviving site using the DPM that is online for
that virtual disk.
Re-establishing the connection with the recovered site after Force Delete
1. Make sure that all the components at the recovered site are online except for the DPM that
was deliberately powered off.
2. Make sure that the VSMs at both sites are online and see each other.
3. Turn on the power to the DPM at the recovered site. The DPM at the recovered site joins the
system as a passive DPM.
4. Recreate the synchronous mirror groups that were deleted when you used the Force Delete
option.
5. Initiate a resynchronization.
Using ForceActive to recover from failed stretched SVSP domains
HP provides a ForceActive utility on the Virtualization Services Manager CD that can automate
the process of recovery when a stretched domain with two sites has failed. This utility is not installed
with a normal VSM software installation, but is provided as an external utility. Best practice would
be to have a copy of this CD at all sites, so that it can be used with a VSM server at a failed site.
Site failures 93