[lustre-discuss] OST Mount Error

Quijano, Omar E. omarq at slac.stanford.edu
Mon Jun 1 09:05:02 PDT 2020


Dear Lustre Users,

There was an issue with a degraded volume group.
After replacing the failed disks and mount the OST in question, I get the following error:

From OSS side:
# mount -v -t lustre /ost_5
arg[0] = /sbin/mount.lustre
arg[1] = -v
arg[2] = -o
arg[3] = rw
arg[4] = /dev/sdg
arg[5] = /ost_5
source = /dev/sdg (/dev/sdg), target = /ost_5
options = rw
checking for existing Lustre data: found
Reading CONFIGS/mountdata
mounting device /dev/sdg at /ost_5, flags=0x1000000 options=osd=osd-ldiskfs,,errors=remount-ro,mgsnode=172.21.49.70 at tcp,writeconf,param=mgsnode=172.21.49.70 at tcp,svname=ana04-OST0005,device=/dev/sdg
mount.lustre: mount /dev/sdg at /ost_5 failed: File exists retries left: 0
mount.lustre: mount /dev/sdg at /ost_5 failed: File exists

From the MDS Side:
 MGS: Connection restored to 172.21.52.57 at o2ib (at 172.21.49.57 at tcp)
Jun  1 08:52:13 kernel: [283815.063427] Lustre: MGS: Regenerating ana04-OST0005 log by user request.
Jun  1 08:52:13  kernel: [283815.063435] Lustre: Found index 5 for ana04-OST0005, updating log
Jun  1 08:52:13  kernel: [283815.063588] Lustre: Client log for ana04-OST0005 was not updated; writeconf the MDT first to regenerate it.
Jun  1 08:52:16  kernel: [283818.785764] Lustre: ana04-MDT0000: Connection restored to 172.21.52.57 at o2ib (at 172.21.49.57 at tcp)
Jun  1 08:56:56  kernel: [284098.343206] Lustre: 21769:0:(client.c:2063:ptlrpc_expire_one_request()) @@@ Request sent has timed out for slow reply: [sent 1591026960/real 1591026960]  req at ffff8803cbb52d00 x1668283989359148/t0(0) o8->ana04-OST0004-osc-MDT0000 at 172.21.49.57<mailto:ana04-OST0004-osc-MDT0000 at 172.21.49.57>@tcp:28/4 lens 520/544 e 0 to 1 dl 1591027016 ref 1 fl Rpc:XN/0/ffffffff rc 0/-1
Jun  1 08:56:56  kernel: [284098.343214] Lustre: 21769:0:(client.c:2063:ptlrpc_expire_one_request()) Skipped 96 previous similar messages

Any input would be greatly appreciated it.
Thank you,
—
Omar E. Quijano
LCLS IT/Networking Department Head
SLAC National Accelerator Laboratory
T: (650) 926-5436

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