Updating The Esm Board Firmware - IBM Midrange System DS4000 Series Hardware Manual

7.1.8 Updating the ESM board firmware

Before performing a firmware upgrade, read the specific firmware version readme file for
details about the installation. Pay attention to any dependencies between controller and ESM,
or drives, because there might be a specific sequence in which each of the components are
updated.
ESM updates are necessary to allow new drive types in the expansion enclosure.
If an ESM is replaced in an EXP5000, EXP520, or EXP810, there is a firmware
synchronization feature that ensures that a new ESM is automatically synchronized with the
firmware in the existing ESM. This resolves any ESM firmware mismatch conditions
automatically. You still have the option to update the ESM firmware manually, to a new level,
or, if there is a failure that prevents the code from synchronizing, identify which ESM is the
original and which is the replacement to synchronize.
For EXP5000, EXP520, and EXP810, there is an option to set the enclosure settings using
the Storage Manager by selecting Maintenance  Download  ESM Configuration
Settings. This option should be used when ESM reports different versions of configuration
settings, and the software could not resolve the mismatch problem by automatically
synchronizing the configuration settings between the two ESMs automatically.
Important: Before upgrading the ESM firmware, make sure that the system is in an
Optimal state. If not, run the Recovery Guru to diagnose and correct the problem before
you proceed with the upgrade.
If you have new expansion enclosures firmware to update, perform the following steps to
transfer a firmware file to the ESM boards:
1. From the Subsystem Management window, select Advanced  Maintenance 
Download  ESM Firmware, as shown in Figure 7-18.
Figure 7-18 ESM firmware upgrade option
Chapter 7. Advanced maintenance, troubleshooting, and diagnostics
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