4.0.0 HP Polyserve Matrix Server Administration Guide (T5392-96052, March 2010)

to the SAN, it is important that each server in the cluster have the same view of where
the partitions are located.
However, it is possible for these views to get out of sync if changes to the membership
partition configuration are made when all servers are not accessible. Therefore,
before a server can negotiate for control of the SAN, it must have a local MP list that
matches the membership lists stored on each of the membership partitions, and each
membership partition must be in the Active state. The mprepair utility can be used
to repair any problems if a failure causes servers to have inconsistent views of the
membership partitions.
View membership partitions and their status
To view the current membership partitions, enter the following command:
mprepair --get_current_mps
This command lists the current membership partitions according to the membership
file maintained on the server where you are running the utility. Each server in the
cluster has a membership partition file, which is called the “local MP list.” Each SAN
disk containing a membership partition also has its own list of the membership
partitions. Under normal operations, these lists should all match.
The output from --get_current_mps contains a record for each membership
partition. Following is a sample record.
20:00:00:04:cf:13:33:12::0/1 OK 8001Kb active
The first field contains the disk UUID followed by a slash and the partition number
(partition 1 in the above example). The second field reports the status of the
membership partition. The third field specifies the size of the membership partition,
and the last field reports whether the membership partition is active or inactive.
The status reported in the second field will be one of the following:
OK. The membership partition is included in the local membership partition list. This
is the normal status.
FENCED. The server has been fenced and cannot access the SAN. Start Matrix Server
if it is not running or reboot the server.
NOT_FOUND. The mprepair utility cannot find the device containing the membership
partition. There may be a problem with the disk or with another SAN component.
When the problem is repaired, the status should return to OK.
INACCESSIBLE. The mprepair utility cannot access the device containing the
membership partition. There may be a problem with the disk or with another SAN
component. When the problem is repaired, the status should return to OK.
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