Re: how to replacie 2778 disk controler with 2780 controller in 5094

[DrFranken <midrange@xxxxxxxxxxxx>]

Yes you can. You will want to be sure to do a endsys to get to 
restricted condition so that the system is quiesced for a bit then do a 
pwrdwnsy. The idea here is because you are replacing the RAID card you 
want to be sure the cache is flushed. IN fact if you're tossing the 
cards you might want to go into SST and fail the cache battery so that 
it forces a flush. Then wait until it says the battery can be safely 
replaced which indicates the cache is completely flushed.

When you IPL with the new 2780s RAID will STOP and be Restarted 
automatically without interaction from you. You need to recognize this 
because if a disk failure occurs during this you will lose your system. 
Recommend to do a SAVE 21 prior to this changeover to protect from this.

 - Larry "DrFranken" Bolhuis

On 11/1/2011 6:03 PM, Glenn Birnbaum wrote:
> Quick question.  We're on a Model 550 (Power 5) running V5R4 on current CUM and PTF groups.  Disks and disk controller are in a 5094.
>
> Can we simply power off an LPAR, pull the existing 2778 disk controller and replace in the same slot with a newer 2780 controller, and then just power back up.  We have older disk (6718 and 6719) under this 2778 .  We hope to replace the 2778 with a 2780 and then create a new RAID 5 set of 70GB drives, then drain and remove the older 6718 and 6719 disk drives.
>
> If simply swapping the disk controllers won't work, then how do you go about the upgrade we're trying to do?
>
> Thanks,
> Glenn Birnbaum
> REI