3ware Controller soft-reset

Problems:

sd 0:0:0:0: WARNING: (0x06:0x002C): Command (0x2a) timed out, resetting card.
3w-9xxx: scsi0: AEN: INFO (0x04:0x005E): Cache synchronization completed:unit=0.
sd 0:0:0:0: WARNING: (0x06:0x002C): Command (0x28) timed out, resetting card.
3w-9xxx: scsi0: AEN: INFO (0x04:0x005E): Cache synchronization completed:unit=0.

As I am facing soft-reset on my controller card, the latest version of the firmware will fix the problem.

Controller Has a Soft Reset when Running I/O on RAID 1 Arrays
(SCR-326)
When a storage array using RAID 1 experiences very high I/O rates, the controller might
experience frequent soft resets. The problem is fixed with this release

3ware release note

As this is a production hardware raid controller card, I can’t upgrade the firmware, so I am going to turn turning off the cache and see if it helps.

[svr1:/root/]# tw_cli /c0/u0 set cache=off

Will update once this run for the next few weeks.