Firmware Upgrade Best Practices

[Louann Duchemin]

BL86c's have two ROM's.  Rom - A and ROM-B.  When you perform an FW upgrade should you up grade both or just one to the newer version and leave the other alone just incase you need to fall back.  I'm looking for best practices guidence.

[Torsten.]

The update will be written to the secondary flash, during next boot this becomes active.

During the next update the new version will be written again to the secondary flash and activated during boot and so on ...

[Louann Duchemin]

So what your saying is it really doesn't matter.  The next time the Blade is booted it will automatically copy the higher version over the lower version?

[Torsten.]

Example:

sysrev before the update:

MP:CM> sysrev


SYSREV


Current firmware revisions



 MP FW     : F.02.17
 BMC FW    : 05.21
 EFI FW    : ROM A 06.20, ROM B 06.20
 System FW : ROM A 03.01, ROM B 03.01, Boot ROM A
 PDH FW    : 50.07
 UCIO FW   : 03.0b
 PRS FW    : 00.08 UpSeqRev: 02, DownSeqRev: 01

and after the update (automatically to ROM B):

MP:CM> sysrev


SYSREV


Current firmware revisions

 MP FW     : F.02.25
 BMC FW    : 05.25
 EFI FW    : ROM A 06.20, ROM B 07.14
 System FW : ROM A 03.01, ROM B 04.11, Boot ROM B
 UCIO FW   : 03.0b
 PRS FW    : 00.08 UpSeqRev: 02, DownSeqRev: 01

[Louann Duchemin]

Thank you again for your reply.  However, it still does not answer my question.  I understand how the process takes, place but I have an Engineer that feels you should only upgrade one ROM, then boot off of that newer version, and keep the other ROM at the older version incase you have to fail back. 

Do you agree or should we just go ahead and upgrade both ROM's?