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From:Matthew Garrett
Date:2 May 2001 at 13:21:38
Subject:Re: Use IDE drives on SCSI interfaces !!!!!!!!!!!!!!!!

On Tue, May 01, 2001 at 07:55:18PM +0000, Andrew Crowe wrote:

> Is there really much point? real SCSI although more expensive are
> still a lot faster then even the newest UDMA66 IDE harddisks

Not really. SCSI and IDE drives are usually identical mechanisms with
different controller boards, and the bandwidth of ATA100 interfaces is
sufficiently high that it's not a limiting factor. Where IDE loses out
greatly is having multiple drives attached to the same interface. SCSI
does have the advantage that new technology usually appears there a
generation before IDE - 7200RPM SCSI drives were available before IDE
ones. If you're only using a small number of drives and you're not going
for the most expensive, IDE and SCSI will give approximately identical
performance.

On the other hand, if you're building RAID arrays... :)



Matthew Garrett | mjg59@srcf.ucam.org

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