Andrew Klaassen writes:
>On Mon, Jun 18, 2001 at 03:55:36PM +1000,
>Robin Humble wrote:
>> Around the time of the 2.4.3 kernel we used XFS over software
>> RAID5 for a month or so before a disk died and we didn't
>> bother replacing it - we've been using 420G (7 disks) of RAID0
>>...
>7 disks? I'm curious: SCSI or IDE? (We're looking into a
IDE. Seven 60G maxtor 7200rpm + two Promise ATA 100 cards and using
both master and slave on each of the 4 IDE controllers. Contrary to
popular belief, using both master and slave only gets you a ~5%
performance hit.
>Promise or 3ware card to allow us to put lots of IDE drives in a
>box and run software RAID over top, and were wondering if anyone
>else has had experience with these cards+software RAID+XFS.)
We're also considering 3ware this time around 'cos they have up to 8
IDE ports per card which saves on PCI slots... we could also try their
hardware RAID5, but I think performance'll be way worse than software
RAID5 - their website site only claims 6MB/s(?) writes(*) and we've
seen more than 3x that with software RAID5 on a slowish celeron.
cheers,
robin
(*) this is for the older 6000 series, and their writing and graphs
conflict about RAID5 write speeds, but I'm going with the graph...
http://www.3ware.com/storage/raid5_slide.asp#a7
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