So, er. Fun. I checked our disks.
0000000 000000 000000 000000 000000 000000 000000 000000 000000 * 0001000 <some data from hereon> Looks like you lost a fair bit. Presumably you don't have replication of 2? If so, I think you could just lose the NSD. Failing that: 1) Check your other disks and see if there's anything that you can figure out. Though TBH, this may take forever. 2) Restore 3) Call IBM and log a SEV 1. 3) then 2) is probably the best course of action Jez > -----Original Message----- > From: [email protected] [mailto:gpfsug-discuss- > [email protected]] On Behalf Of Chad Kerner > Sent: 13 February 2013 16:29 > To: [email protected] > Subject: [gpfsug-discuss] File system recovery question > > I have a file system, and it appears that someone dd'd over the first > part of one of the NSD's with zero's. I see the device in multipath. I > can fdisk and dd the device out. > > Executing od shows it is zero's. > (! 21)-> od /dev/mapper/dh1_vd05_005 | head -n 5 > 0000000 000000 000000 000000 000000 000000 000000 000000 000000 > * > 0040000 120070 156006 120070 156006 120070 156006 120070 156006 > > Dumping the header of one of the other disks shows read data for > the other NSD's in that file system. > > (! 25)-> mmlsnsd -m | grep dh1_vd05_005 > Disk name NSD volume ID Device Node name > Remarks > --------------------------------------------------------------------------------------- > dh1_vd05_005 8D8EEA98506C69CE - myhost (not found) server > node > > (! 27)-> mmnsddiscover -d dh1_vd05_005 > mmnsddiscover: Attempting to rediscover the disks. This may take a > while ... > myhost: Rediscovery failed for dh1_vd05_005. > mmnsddiscover: Finished. > > > Wed Feb 13 09:14:03.694 2013: Command: mount desarchive Wed Feb > 13 09:14:07.101 2013: Disk failure. Volume desarchive. rc = 19. Physical > volume dh1_vd05_005. > Wed Feb 13 09:14:07.102 2013: File System desarchive unmounted by > the system with return code 5 reason code 0 Wed Feb 13 09:14:07.103 > 2013: Input/output error Wed Feb 13 09:14:07.102 2013: Failed to open > desarchive. > Wed Feb 13 09:14:07.103 2013: Input/output error Wed Feb 13 > 09:14:07.102 2013: Command: err 666: mount desarchive Wed Feb 13 > 09:14:07.104 2013: Input/output error Wed Feb 13 09:14:07 CST 2013: > mmcommon preunmount invoked. File system: desarchive Reason: > SGPanic > > Is there any way to repair the header on the NSD? > > Thanks for any ideas! > Chad > > > _______________________________________________ > gpfsug-discuss mailing list > [email protected] > http://gpfsug.org/mailman/listinfo/gpfsug-discuss _______________________________________________ gpfsug-discuss mailing list [email protected] http://gpfsug.org/mailman/listinfo/gpfsug-discuss
