Steve Lord schrieb:
>
> > A little update,
> >
> > At least, some better news:
> > I did *NOT* see the problem (yet!) with the noapic option
> > with 2.4.7pre8-SMP
>
> I am informed that there is a fix in the latest kernels in the raid5 code
> to fix some stall issues which ext3 hit. So it maybe that the answer here
> is to run the latest kernels. I still do not like the fact we do non-stripe
> friendly I/O to the log, and want to look into that.
>
> Jani, this may also be the source of your problems, we did experience
> an almost complete lockup here with the 1.0.1 rpm kernel. If you get a
I'd like to reproduce this 'almost complete lockup' here, how can I do
this. I mean do I need SMP to reproduce this and what kind operation
did you do on the filesystem to force the lookup? Are we safe on UP?
> chance can you run the latest cvs kernel?
>
> Steve
>
> >
> > Steve Lord wrote:
> > >
> > <...>
> >
> > > If you choose another partition (non raid5) for the log and make an
> > > externa
> > l
> > > log instead of using an internal log then the issue should go away, we
> > > are going to test this here. I suppose a mirrored log would be the best
> > > solution here as you could still survive the loss of a drive with the
> > > log on it.
> >
> > I wish I could do that :)
> > - hda and hdc on a raid 1 array (system disk) + mirrored xfs log
> > - sda..sdh for a 7 disk + 1 hot spare disk for the raid5 array.
> >
> > The only issue is space, trying to squeeze a second IDE disk
> > on the second IDE controller will not easily be manageable is
> > the rack :(
> > I do have a spare system disk on the shelf, and quick method to
> > restore the system disk but I would not risk putting the xfs log
> > on this lone disk.
> >
> > What if I cut the 8 disks in 2 parts
> > 1st partition of sd[a..d] of 2 GB (enough?) for a raid10 array for the
> > log
> > 2nd partition of sd[a..g] for the main raid5 array
> > sdh for the hot spare?
> >
> > Best regards,
> >
> > Tru
> > --
> > Dr Tru Huynh | Bioinformatique Structurale
> > mailto:tru@xxxxxxxxxx | tel/fax +33 1 45 68 87 37/19
> > Institut Pasteur, 25-28 rue du Docteur Roux, 75724 Paris CEDEX 15 France
--
Simon Matter Tel: +41 61 695 57 35
Fr.Sauter AG / CIT Fax: +41 61 695 53 30
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