djk at tobit.co.uk
Thu Nov 1 15:47:33 GMT 2007
David Cantrell wrote:
> On Thu, Nov 01, 2007 at 01:32:05PM +0000, Dirk Koopman wrote:
>> Depends what you want. Unless the processors in RAID cards have been
>> significantly beefed up in recent hardware - if it is speed you want -
>> then software raid wins hands down all the time.
> Until you remember that software RAID is usually combined with IDE, and
> therefore runs like a stunned slug.
Actually no. We did a comparison with three discs on a (adaptec) SCSI
160 in raid 0, software raid 0 on the same controller (same discs) but
just in plain SCSI and, for a bit of fun, raid 0 on three random (but
reasonably quick) IDE drives connected to the two IDE ports of the same
IIRC the results were: software raid in SCSI nearly 5 times as fast,
ditto IDE 2.5 times as fast as the adaptec doing its hardware raid 0.
More information about the london.pm