HP StorageWorks 9100 Extreme Data Storage System administration guide V1.0.2 (AN540-96018, February 2010)

5. At this stage, you have identified that the problem is with an X9700cx I/O module. Determine
if the fault lies with the top or bottom modules. For example, if the seven-segment display shows
C1 02, then the fault may lie with one of the primary (top) I/O modules.
6. Stop I/O to the affected storage block by pausing all filesystems except the utility files ystem (/
var/mxso):
a. Run the following command:
exdsmgr show luns
Note the used by fields of LUNs on the affected array having a role of “data.”
b. Run the following command:
exdsmgr show filesystems
c. Note the device names that match the highlighted LUNs and suspend each filesystem with
the following command:
psfssuspend filesystem-path
where filesystem-path is the full path to the filesystem mount point on the server.
For example, for a filesystem mounted at /mnt/exds_2_1, suspend it using the following
command:
pfssuspend /mnt/exds_2_1
Repeat this for all filesystems except the utility filesystem (/var/mxso).
NOTE:
• Suspending the filesystems causes any I/O requests on them to be blocked. Depending
on the application using the storage, this could cause an I/O timeout, or the application
to wait until the filesystem is resumed.
• The filesystem suspend command must be run on a server that has the filesystem
mounted. All filesystem suspend and filesystem resume commands for a
given filesystem should be carried out on a single server.
• Make sure to only execute thefilesystem suspend command once for each
filesystem, because the command is cumulative. When resuming the filesystem, make
sure to issue the filesystem resume command on the same server on which the
corresponding filesystem suspend command was run; otherwise, it will not be
effective.
Troubleshooting136