3.6.1 HP PolyServe Matrix Server Administration Guide (T5392-96018, August 2008)

Chapter 20: SAN Maintenance 263
• Repeated I/O errors when the server tries to write to a PSFS journal.
The server then loses access to the affected filesystem. When the disk
experiencing the I/O errors is fixed, the server will automatically
regain access to the filesystem.
The PolyServe Management Console typically displays an alert message
when a server loses access to the SAN.
PSFS Filesystem Panic Messages
If you receive a panic message from the PSFS filesystem, report it to HP
Support at your earliest convenience. Then reboot the affected server to
recover from the error condition.
Membership Partitions
Matrix Server uses a set of membership partitions to control access to the
SAN and to store the mxds datastore and the device naming database.
(The mxds datastore contains matrix configuration information and the
device naming database includes the global device names for SAN disks
imported into the matrix.) Typically the membership partitions are
created when you install Matrix Server. You can add, replace, or repair
membership partitions as necessary.
When a membership partition is placed under Matrix Server control,
write access is disabled to prevent accidental corruption from other
applications.
Change Partitioning on Disks with Membership
Partitions
We recommend that you do all necessary partitioning on disks that will
contain membership partitions before assigning the membership
partitions. It is best to do the partitioning before multiple servers have
access to the disk. If this is not possible, ensure that all servers having
access to the disk through the SAN detect the partition table changes
before continuing on with membership partition initialization.
This can be done either by rebooting the servers after you make the
partition table changes, or by manually disabling access to the disks