On Wed, Nov 15, 2006 at 04:40:37PM +0100, Didier Wiroth wrote:
> Hi,
> I've installed an Openbsd4.0 server with a LSI Megaraid S-ATA 150-6 LSI
> Controller. It has a RAID5 logical drive containing 6 HDs (1 is hot spare).
>
> $ sudo bioctl ami0
> Volume Status Size Device
> ami0 0 Scrubbing 1600332496896 sd0 RAID5 60% done
> 0 Online 400083124224 0:0.0 noencl < ST3400620NS
> 3.AE>
> 1 Online 400083124224 0:2.0 noencl < ST3400620NS
> 3.AE>
> 2 Online 400083124224 0:1.0 noencl < ST3400620NS
> 3.AE>
> 3 Online 400083124224 0:4.0 noencl < ST3400620NS
> 3.AE>
> 4 Online 400083124224 0:3.0 noencl < ST3400620NS
> 3.AE>
> ami0 1 Hot spare 400083124224 0:5.0 noencl < ST3400620NS
> 3.AE>
>
> I would like to use most of the space for /home/backup!
>
> I thought about using 4x350GB (or X x XXX GB, any recommandations are
> appreciated) partitions (to reduce the fsck times when fsck is needed),
> and concatenate them via ccd to /home/backup?!
>
> Is this the best way to do it or would you recommand me to do it
> differently?
As ckuethe@ pointed out, that's too big. Additionally, you need about as
much memory (in megabytes) as disk (in gigabytes) for fsck.
Depending on exactly how the backups are done, it might be sensible to
mount at least three of those 350GB partitions read-only at any given
time. This would allow you to come up dramatically faster after a crash;
although this may not be that important for a backup server...
Joachim
