IBM TotalStorage EXP100, Installation, User'S, And Maintenance Manual

Page: 122 / 188

Table 15. Existing EXP100 ESM and new EXP100 ESM firmware compatibility levels
Existing EXP100 ESM
firmware version
New EXP100 ESM
firmware version Corrective action
956x or later (R3 ESM) 956x or later (but is a
different version than the
existing R3 ESM)
You can upgrade the ESM
firmware with I/Os although it is
recommended that you update
the ESM firmware during a
period of low DS4000 I/O
activity.
953A or earlier (R1 ESM) 953A or earlier (but is a
different version than the
existing R1 ESM)
You must schedule down time
for the ESM firmware upgrade.
Upgrade to either the same R1
ESM (953A or earlier) version or
the R3 ESM version (956x or
later). All I/Os must be stopped.
If there are any I/Os during the
ESM firmware upgrade, drives
might randomly be marked
failed. IBM strongly recommends
that you upgrade to R3 ESM
because this code level contains
quality enhancements and Full
High Availability EXP100
function.
CAUTION:
If you plan to upgrade the
ESM firmware to the R3
version, you must upgrade
the ESM to the intermediate
ESM firmware version 9554
first before upgrading to the
R3 ESM version (956x or
later).
9554 (R2 ESM) or 956x and
later (R3 ESM)
953A or earlier (R1 ESM) You cannot upgrade the ESM
firmware version. Contact IBM
technical support, your IBM
reseller, or IBM representative
for the correct CRU 25R0156
(ESM firmware 9554) or CRU
39M6004 (ESM firmware 956x
or later).
9554 (R2 ESM) 956x or later (R3 ESM) You can only upgrade the ESM
firmware version of both ESMs
to 956x or later. Downgrading
the EXP100 ESM with a higher
ESM firmware version to a lower
firmware version is not
supported. Contact IBM
technical support, your IBM
reseller, or IBM representative
for the correct EXP100
FRU/CRU with the ESM
firmware version 9554 (P/N
25R0156).
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IBM TotalStorage DS4000 EXP100 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide
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