3.4.0 Matrix Server Administration Guide

Chapter 17: SAN Maintenance 195

INACCESSIBLE. The mprepair utility cannot access the device containing

the membership partition.

CORRUPT. The partition is not valid.

MISMATCH. The membership partition is valid but its MP list does not

match the server’s local MP list.

If the status is

NOT FOUND or INACCESSIBLE, there may be a problem

with the disk or with another SAN component. When the problem is

repaired, the status should return to

OK.

If the status is

CORRUPT, you should resilver the partition. This step

copies the membership data from a valid membership partition to the

corrupted partition.

NOTE: The membership partition may have become corrupt because it

was used by another application. Before resilvering, verify that it

is okay to overwrite any existing data on the partition.

If the status is

MISMATCH, you will need to determine which

membership partitions are correct (the partitions specified in the local MP

list, or the partition labeled

MISMATCH) and resilver accordingly.

Active and Inactive Membership Partitions

A membership partition can be either active or inactive. (This attribute is

reported in the last field of the record displayed by the mprepair

--get_current_mps command.) The current membership partitions

should all be active. If there are old membership partitions in the matrix,

you may want to either remove them or mark them as inactive.

A matrix could have an old membership partition if the disk containing it

becomes inaccessible and you then add another partition in its place.

When the disk access problem is corrected, the old membership partition

will still be on the disk and will be marked active.

When a membership partition is active, the disk containing the partition

cannot be imported into the matrix. You may see this situation if you

want to import a disk that was previously used by another matrix.