[Lustre-discuss] recovering formatted OST

Bernd Schubert bs_lists at aakef.fastmail.fm
Tue Oct 26 12:11:47 PDT 2010


On Tuesday, October 26, 2010, Wojciech Turek wrote:
> On 26 October 2010 19:55, Wojciech Turek <wjt27 at cam.ac.uk> wrote:
> > In that case LAST_ID seem to be fine as OST show 2490599 and MDT shows
> > 2490688 so the difference is 89, I don't understand why you said that
> > difference is over 100000

Oh sorry, somehow I remembered another number for your OST, but don't know 
where I got that number from.

> > 
> >  [root at oss09 ~]# od -Ax -td8 /tmp/LAST_ID
> >  
> >   000000              2490599
> >   000008
> >  
> >  [root at mds03 ~]# od -Ax -td8 /tmp/lov_objid
> >  
> >   000000              2073842              2100049
> >   000010              2115247              2038471
> >   000020              2119821              2190996
> >   000030              2029234              2354424
> >   000040              2160856              2167105
> >   000050              1970351              2059045
> >   000060              2706486              2571655
> >   000070              2662262              2628346
> >   000080              2490688              2668926
> >   000090              2631587              2643791
> >   0000a0
> > 
> > What I don't understand is why lctl reports last_id=1 for that OST
> > 
> > lctl get_param osc.*.prealloc_last_id | grep OST0010
> > osc.scratch2-OST0010-osc.prealloc_last_id=1
> 
> Unless this is because that OST is deactivated on the MDT ?


Yeah, simply ignore that. Should get the correct value when you activate the 
OST.

Cheers,
Bernd

-- 
Bernd Schubert
DataDirect Networks



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