Command Reference Guide

Chapter 1: Matrix Server Commands 30

membership partition. Before a matrix can begin accessing the SAN, it must

first acquire a majority of the SANlocks. The SANlocks are acquired in order.

mxsanlk displays the status of the SANlock stored in each membership

partition. It can be used to determine whether any of the membership

partitions need to be repaired. Also, if a network partition occurs, mxsanlk

can be used to determine which network partition has control of the SAN.

Following is some sample output. The command was issued on host

99.10.30.3. The SDMP administrator is the administrator for the matrix to

which the host belongs. There are three membership partitions.

# mxsanlk

This host: 99.10.30.3

This host’s SDMP administrator: 99.10.30.1

Membership Partition SANlock State

-------------------- -------------

/dev/rpsd/psd1p1 held by SDMP administrator

/dev/rpsd/psd2p1 held by SDMP administrator

/dev/rpsd/psd3p3 held by SDMP administrator

Any of these messages can appear in the “SANlock State” column.

held by SDMP administrator

The SANlock was most recently held by the SDMP administrator of the

matrix to which the host where mxsanlk was run belongs.

trying to lock, last held by host X.X.X.X

The SANlock was most recently held by host X.X.X.X and may still be

held by that host. The host on which mxsanlk was run is trying to acquire

the SANlock.

cannot access

The host on which mxsanlk was run is unable to access the SANlock. The

membership partition may need to be repaired.

trying to lock, not yet committed by owner

The SANlock is either not held or has not yet been committed by its

holder. The host on which mxsanlk was run is trying to acquire the

SANlock.