Cliff, thank you for your help so far.
Unfortunately, the initial e2fsck's (-n) of both the MDT and the OSTs
did not come back clean. Using -p, the OSTs cleaned up nicely (in
fact, most OST problems went away after the journal was recovered).
The MDT had many files dumped to lost+found.
When I run lfsck -d it never seems to delete the orphans...
Subsequent runs show exactly the same orphans. Many lines like this
for all OSTs:
[0] zero-length orphan objid 1
[0] zero-length orphan objid 960
[0] zero-length orphan objid 992
lfsck: [0]: pass3 orphan found objid 1207392, 6234112 bytes
lfsck: [0]: pass3 orphan found objid 1207360, 6234112 bytes
Shouldn't those be deleted when using -d? Or am I misunderstanding
the documentation?
Thanks again!
-Joe
On Mon, Feb 7, 2011 at 17:00, Cliff White cli...@whamcloud.com wrote:
You should not have to do the lfsck if the initial fsck's come back clean.
cliffw
On Mon, Feb 7, 2011 at 1:16 PM, Joe Digilio jgd-lus...@metajoe.com wrote:
Last week we experienced a major hardware failure (disk controller)
that brought down our system hard. Now that I have the replacement
controller, I want to make sure I recover correctly. Below is the
procedure I plan to follow based on what I've gathered from the
Operations Manual.
Any comments?
Do I need to create the mds/ost DBs AFTER ll_recover_lost_found_objs?
Thanks!
-Joe
###MDT Recovery
# Capture fs state before doing anything
e2fsck -vfn /dev/$MDTDEV
# safe repair
e2fsck -vfp /dev/$MDTDEV
# Verify no more problems and generate mdsdb
e2fsck -vfn --mdsdb /tmp/mdsdb /dev/$MDTDEV
###OST Recovery
foreach OST
# Capture fs state before doing anything
e2fsck -vfn /dev/$OSTDEV
# safe repair
e2fsck -vfp /dev/$OSTDEV
# Verify no more problems
e2fsck -vfn --mdsdb /tmp/mdsdb --ostdb /tmp/ostXdb /dev/$OSTDEV
### Recover lost+found Objects
foreach OST
mount -t ldiskfs /dev/$OSTDEV /mnt/ost
ll_recover_lost_found_objs -v -d /mnt/ost/lost+found
### Coherency Check
lfsck -n -v --mdsdb /tmp/mdsdb --ostdb
/tmp/ost1db,/tmp/ost2db,...,/tmp/ostNdb /lustre
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