Before you upgrade your controller’s software and firmware, be aware of these items.

These components are part of the ThinkSystem SAN OS controller software upgrade:

As part of the upgrade process, the host’s multipath/failover driver and/or HBA driver might also need to be upgraded so the host can interact with the controllers correctly.

To determine if this is the case, see the LSIC.

If your storage array contains only one controller or you do not have a multipath driver installed, stop I/O activity to the storage array to prevent application errors. If your storage array has two controllers and you have a multipath driver installed, you do not need to stop I/O activity.

Do not make changes to the storage array while the upgrade occurs.