Re: Reclaiming Cache on an IOA

Larry Bolhuis wrote:
>   OK It is documented in the repair and parts manual but essentially
> the process is this:
>
>   1) IPL to DST
>   2) Work with Disk Units
>   3) Work with Disk Unit recovery
>   4) Reclaim IOP Cache Storage.
>   5) Follow the steps there.

Sounds easy enough.

>    In my experience you should have a good backup. I have had the
> system go casters up after doing this but I don't think that will
> happen to you since you CAN get the system running. It will tell you
> that some sectors are bad and that damaged objects may result. You
> have to figure out what those objects could be.

Interesting, I wouldn't know anything was wrong if the 400 didn't see it;
the system is running fine.

>    One thing I recently did that caused this problem was to have a
> system powered off hard (pull the plug) but then leave it unpowered
> for several weeks. Upon re-application of power the cache batteries
> had died so the cache data was lost. The end result in my case was
> files in both QSRvDRCTR and QMPPGDATA getting hosed. No big loss.

The card must have been pulled from a unit that was not shut down properly.

>    Hope this helps.

It did immensely, thanks.