[lustre-discuss] Problems on mds/mgs

[Mohr Jr, Richard Frank (Rick Mohr)]

(Re-added lustre-discuss to CC list)


> On Apr 22, 2015, at 9:04 AM, Sven Schumacher <schumacher at tfd.uni-hannover.de> wrote:
> 
> Hi Rick,
> 
> thanks for your answer.
> when I try to mount the osts without having mounted the mgs/mds,
> I get on the oss:
>> root at oss1:~# mount -t lustre /dev/vg_ost0/ost0 /lustre/ost0
>> mount.lustre: set /sys/block/dm-5/queue/max_sectors_kb to 127
>> 
>> mount.lustre: set /sys/block/dm-2/queue/max_sectors_kb to 127
>> 
>> mount.lustre: set /sys/block/dm-0/queue/max_sectors_kb to 127
>> 
>> mount.lustre: set /sys/block/sdc/queue/max_sectors_kb to 32767
>> 
>> mount.lustre: set /sys/block/sde/queue/max_sectors_kb to 32767
>> 
>> mount.lustre: set /sys/block/sdg/queue/max_sectors_kb to 32767
>> 
>> mount.lustre: set /sys/block/sdi/queue/max_sectors_kb to 32767
>> 
>> mount.lustre: mount /dev/mapper/vg_ost0-ost0 at /lustre/ost0 failed:
>> Input/output error
>> Is the MGS running?
>> 
> Anyone else any hint?

You need to mount both the MDT/MGT and the OST.

--
Rick Mohr
Senior HPC System Administrator
National Institute for Computational Sciences
http://www.nics.tennessee.edu