Google first, ask later. I found this in the manuals:
26.3.4 Fixing a Bad LAST_ID on an OST
The procedures there spell out pretty well what I must do, so this
should be relatively straight forward. But, does this comment refer to
just this OST, or to all OST?
*Note - *The file system must be stopped on all servers before
performing this procedure.
So, is this the best approach to follow, allowing for the fact that
there is nothing at all left on the OST, or is there a better short cut
to choosing an appropriate LAST_ID?
On 5/19/2014 1:50 PM, Bob Ball wrote:
I need to completely remake a failed OST. I have done this in the
past, but this time, the disk failed in such a way that I cannot fully
get recovery information from the OST before I destroy and recreate.
In particular, I am unable to recover the LAST_ID file, but
successfully retrieved the last_rcvd and CONFIGS/* files.
mount -t ldiskfs /dev/sde /mnt/ost
cp -p LAST_ID /root/reformat/sde
The O directory exists, but it is empty. What can I do concerning
this missing LAST_ID file? I mean, I probably have something,
somewhere, from some previous recovery, but that is way, way out of date.
My intent is to recreate this OST with the same index, and then put it
back into production. All files were moved off the OST before
reaching this state, so nothing else needs to be recovered here.
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