Dell PowerVault ME5 Series Administrator's Guide

NOTE To ensure success of an online update, select a period of low I/O activity. This helps the update complete as quickly as possible and avoids disruptions to host and applications due to timeouts. Attempting to update a storage system that is processing a large, I/O-intensive batch job will likely cause hosts to lose connectivity with the storage system.

NOTE Consider the following points before performing a firmware update:

• If a disk group is quarantined, resolve the problem that is causing the component to be quarantined before updating the firmware.
• If any unwritten cache data is present, firmware update will not proceed. Before you can update firmware, unwritten data must be removed from cache. For more information about the clear cache command, see the CLI Reference Guide.
• If the health of the system is Fault, the firmware update cannot proceed. Before you can update firmware, you must resolve the problem specified by the Health Reason value on the System Overview panel.