3.4.0 Matrix Server Administration Guide

Chapter 17: SAN Maintenance 194

mprepair Utility

The mprepair utility can be used to repair any problems if a failure causes

servers to have inconsistent views of the membership partitions. This

utility is invoked from the operating system prompt.

NOTE: Matrix Server cannot be running when you use mprepair. To stop

the matrix, issue the command net stop matrixserver from the

Command Prompt.

View Membership Partitions and Their Status

To view the current membership partitions, type the following command

at the operating system prompt:

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 matrix 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.

NOT FOUND. The mprepair utility cannot find the device containing the

membership partition.