[Lustre-discuss] [HPDD-discuss] Unable to move MDS using procedure in the manual

[Colin Faber]

Hi Ken,

Which version?

-cf


On Tue, Jun 4, 2013 at 11:44 AM, Ken Hornstein <kenh at cmf.nrl.navy.mil>wrote:

> I tried to move my MDS from one filesystem on the same machine to another,
> using the procedure outlined in the Lustre manuals (I didn't use dd, since
> the underlying disks weren't the same size and also I did not think
> it was required).
>
> Specifically, I used rsync to copy the files, and also used
> getfattr/setfattr
> to copy over the extended attributes.  Some brief poking around seemed to
> show that the EA information made it into the new filesystem.
>
> However, when I went to mount the "new" MDS partition, it failed with the
> following error:
>
> May 30 23:36:50 mds-foo kernel: [  186.604083] LustreError:
> 3082:0:(md_local_object.c:433:llo_local_objects_setup()) creating obj [fld]
> fid = [0x200000001:0x3:0x0] rc = -116
> May 30 23:36:50 mds-foo kernel: [  186.698205] LustreError:
> 3082:0:(mdt_handler.c:4576:mdt_init0()) Can't init device stack, rc -116
> May 30 23:36:50 mds-foo kernel: [  186.797206] LustreError:
> 3082:0:(obd_config.c:522:class_setup()) setup foo-MDT0000 failed (-116)
> May 30 23:36:50 mds-foo kernel: [  186.806140] LustreError:
> 3082:0:(obd_config.c:1363:class_config_llog_handler()) Err -116 on cfg
> command:
> May 30 23:36:50 mds-foo kernel: [  186.815615] Lustre:    cmd=cf003
> 0:foo-MDT0000  1:foo-MDT0000_UUID  2:0  3:foo-MDT0000-mdtlov  4:f
>
> There were more errors, bu they all pretty much were cascading from these
> errors.  I switched back to the original filesystem and everything worked.
>
> I am willing to believe I did something wrong, but I'm not sure what; I
> did everything the directions said to do.  -116 is ESTALE, and I found
> in the code where I believe that error was returned, but it was a little
> unclear to me what the root cause was.  Can anyone offer any advice?
>
> --Ken
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