Upgrading Firmware When Replacing A Failed Hot-Swap Esm - IBM TotalStorage DS4000 EXP100 Installation, User's, And Maintenance Manual

Upgrading firmware when replacing a failed hot-swap ESM

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If you find that there is an ESM firmware mismatch when you replace an ESM (see
Table 14 on page 95), you must make corrections to match the ESM firmware as
soon as background firmware operations, such as rebuilds and copybacks, have
completed. Refer to Table 13 on page 88 for your particular upgrade procedure. In
certain cases, you must schedule down time for the upgrade because there can be
no I/O activity, including background firmware operations, to the storage subsystem
at the time of the upgrade.
See "EXP100 ESM CRU types, firmware, and release levels explained" on page 6
for more information about the different firmware release levels. Also, see
"Determining firmware levels" on page 11 for more information on how to determine
your current ESM card firmware version.
Chapter 3. Installing and replacing devices
87