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

1. 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 resume commands for a given filesystem should be carried
out on a single server.
• Make sure to only execute the filesystem 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 was run; otherwise, it will not be effective.
2. Ensure that the disk drawer is fully pushed in and locked.
3. Disconnect the SAS cable connecting the I/O module to the HP ExDS9100cc controller.
4. It is normal for the HP ExDS9100cc connected to the I/O module to reset itself. The seven-segment
display of the HP ExDS9100c enclosure will no longer show “on,” and the HP ExDS9100cc
controller will have an amber warning light. If the I/O module had previously failed, the HP
ExDS9100cc controller will already be in this state.
5. Remove the I/O module.
6. Replace the I/O module (it will not engage with the disk drawer unless the drawer is fully pushed
in).
7. Re-attach the SAS cable. Ensure it is attached to the “IN” port.
Replacing components in the HP ExDS9100 Storage System118