Online upgrade
Offline upgrade
During an online upgrade, drives are upgraded
sequentially, one at a time. The storage array
continues processing I/O while the upgrade occurs.
You do not have to stop I/O. If a drive can do an
online upgrade, the online method is used
automatically.
Drives that can do an online upgrade include the
following:
• Drives in an Optimal pool
• Drives in an Optimal redundant volume group
(RAID 1, RAID 5, and RAID 6)
• Unassigned drives
• Standby hot spare drives
Doing an online drive firmware upgrade can take
several hours exposing the storage array to
potential volume failures. Volume failure could occur
in these cases:
• In a RAID 1 or RAID 5 volume group, one drive
fails while a different drive in the volume group is
being upgraded.
• In a RAID 6 pool or volume group, two drives fail
while a different drive in the pool or volume group
is being upgraded.
During an offline upgrade, all drives of the same
drive type are upgraded at the same time. This
method requires stopping I/O activity to the
volumes associated with the selected drives.
Because multiple drives can be upgraded
concurrently (in parallel), the overall downtime is
significantly reduced. If a drive can do only an
offline upgrade, the offline method is used
automatically.
The following drives MUST use the offline method:
• Drives in a non-redundant volume group (RAID
0)
• Drives in a non-optimal pool or volume group
• Drives in SSD cache
Workflows for upgrading software and firmware
Use ThinkSystem System Manager to perform the upgrade steps shown in the following workflows for
controller software and firmware and drive firmware.
Upgrade controller software and firmware workflow
Start
⇩
Download software files.
⇩
Transfer the software files to the controllers.
⇩
Activate software files.
⇩
Complete software and firmware upgrade.
⇩
Finish
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