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

14. Run the exdsmgr syscheck command to validate that the firmware level is correct and that
no other failures have occurred.
Replacing the HP ExDS9100cx I/O module
IMPORTANT:
You must change the firmware of a replaced I/O module; therefore, schedule system downtime of
approximately one hour to perform this procedure.
There are four I/O modules in an HP ExDS9100cx chassis—two I/O modules (primary/secondary)
for each of the drawers: two on the left, two on the right. Within each drawer you can hot swap one
I/O module at a time. Disconnecting both I/O modules interrupts I/O operations.
The storage block must be brought to a quiescent state before I/O module replacement, and I/O
module firmware must be flashed to a consistent state—that is, all four I/O modules must be on the
same firmware version, before returning the HP ExDS9100cx to normal operation.
To replace the HP ExDS9100cx I/O module:
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