Exp100 Esm Cru Types, Firmware, And Release Levels Explained; Exp100 Esm Cru Types - IBM TotalStorage DS4000 EXP100 Installation, User's, And Maintenance Manual

EXP100 ESM CRU types, firmware, and release levels explained

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6
IBM TotalStorage DS4000 EXP100 Storage Expansion Enclosure: Installation, User's and Maintenance Guide
Understanding the information in this section is essential to completing an accurate
EXP100 installation.
ATTENTION:
The firmware in your new EXP100 ESM CRUs might not be compatible with
the firmware of your existing ESM module in the EXP100 expansion
enclosure. You MUST ensure ESM firmware compatibility before you replace
any ESM CRUs in the EXP100 expansion enclosure. Please refer to Table 5
on page 7 for information on the CRU part number and the ESM firmware
level that is compatible with your EXP100 expansion enclosure. A loss of data
access and, in some cases, a loss of data will result if an ESM with
incompatible firmware is installed in the same EXP100 expansion enclosure.
DO NOT rely solely on the CRU part number of the installed ESM to
determine the ESM firmware level. Instead, use the procedure described
in"Determining firmware levels" on page 11 to determine the current firmware
level of the existing ESM in the EXP100 expansion enclosure and ensure that
the new replacement ESM is compatible with the installed ESM. The existing
ESM firmware might have been previously updated.
For more information about the EXP100 ESM replacement procedure, ESM
firmware upgrades, and problem troubleshooting, please refer to the following
sections in this document:
v "Replacing a failed hot-swap ESM" on page 85
v "Upgrading ESM firmware after adding the EXP100 to an existing drive loop" on
page 68
v "Solving problems" on page 99
v "Troubleshooting" on page 95
If you need further assistance, please contact IBM technical support, your IBM
reseller, or IBM representative to find out which EXP100 CRU is compatible with the
ESM firmware of your existing ESM expansion enclosure.

EXP100 ESM CRU types

There are three types of EXP100 ESM CRUs - R1, R2, and R3, which are
described as follows:
v R1 refers to EXP100 ESMs that offer Limited High-Availability (LHA) support and
are only compatible with ESM firmware version 953x and earlier. R1 is no
longer supported.
v R2 refers to EXP100 ESMs that offer Full High-Availability (FHA) support and are
compatible with ESM firmware version 9554.
v R3 refers to EXP100 ESMs that offer Full High-Availability (FHA) support and are
compatible with ESM firmware version 956x and later. The current EXP100
release is shipped with R3 ESM firmware, which enables the support of the new
400 GB SATA drive option (P/N 39M4570) 400 GB CRU/FRU (P/N 39M4575),
and the new 250 GB SATA drive CRU/FRU (P/N 40K6837.