[CentOS] CentOS 5.2 with IBM SERVERAID 6i
chris.gelden at iafrica.com
Tue Nov 18 18:09:49 UTC 2008
miguelmedalha at sapo.pt wrote:
> I need to install CentOS 5.2 on a IBM Server xSeries 226, which comes
> with a IBM SERVERAID 6i RAID card. I think it is not a true hardware
> RAID card. I has, nevertheless, an interesting feature: 128MB of cache
> with battery backup.
> I launched the CentOS boot DVD and CentOS correctly identified the
> card and the RAID 5 array as configured by the controller's BIOS.
> My question now is: what would be the better way to implement RAID 5
> on this server? Should I use the detected array and respective driver
> or should I delete the array and go for Linus Software RAID?
> If both solutions are in fact Software RAID, is there any particular
> reason to prefer one of the methods?
> I know that Linux RAID will create a universal, more compatible array,
> readable on any Linux machine. But is there some other reason that
> makes it preferrable to use the SERVERAID driver provided by CentOS?
> Is it optimized in any way that recommends its use?
> Will the controller still make use of its cache and battery backup if
> configured as a plain SCSI controller with Linux Software RAID?
> I hope that some more experienced list member can ellucidate me on this.
> Thank you!
> PS - The machine is powered by a Intel P4 Xeon processor served by
> 2.5GB of RAM. The disks are 3 IBM 10K rpm SCSI 320 with 73 GB each.
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> CentOS at centos.org
FWIW I have been running an IBM e server 346 with 6 73GB disks in two
RAID volumes using the SERVERAID drivers for 3 years with no problems -
performance is mucj better than my development system that used single -
non-rad disks for various partitions.
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