[Lustre-discuss] OST index 0 missing--follow up

[Ms. Megan Larko]

Hi,

A follow-up to my own post.   I did not look well enough.   The MGS
"lctl dl" showed one device indeed missing even though I did not
deactivate it and it is on the OSS correctly.
The error message about "OST index 0 missing" is that on the MGS
crew2-OST0000 is missing.

[root at mds1 ~]# lctl dl
  0 UP mgs MGS MGS 5
  1 UP mgc MGC192.168.64.210 at o2ib ab3c594f-d965-b3c2-9180-121ffcf236cd 5
  2 UP mdt MDS MDS_uuid 3
  3 UP lov crew2-mdtlov crew2-mdtlov_UUID 4
  4 UP mds crew2-MDT0000 crew2mds_UUID 4
  5 UP osc crew2-OST0001-osc crew2-mdtlov_UUID 5
  6 UP osc crew2-OST0002-osc crew2-mdtlov_UUID 5


There should be a "crew2-OST0000".  On the OSS, I have issued a "mount
-o remount /srv/lustre/OST/crew2-OST0000".   The disk is seen on the
OSS in a "df".  Again, no errors on the OSS nor the MGS.    I have
also tried to remount the MGS crew2 MDT disk.   No change.   What I
need is something like an "lctl activate crew2-OST0000".   That
command uses the NID and in this instance I have no NID to activate.
 The unmounting/mounting of the MDT did not cause a re-read of the OSS
disks.  Is there a way in which I can add the OST back in?  It should
not have been omitted in the first place.

Cheers!
megan