[Gllug] re: SCSI vs IDE

[Martin A. Brooks]

On Mon, 2003-07-28 at 13:12, t.clarke wrote:
> We use SCSI exclusively here on the main server because
> a) they get data in and out of memory much faster than IDE

True now, but won't be forever. SATA systems will, in the medium term,
vastly outperform SCSI, the theoretical datarate limit is much higher.  

SSCSI has been talked about but I've yet to see anything concrete.

> b) they appear to use much fewer CPU cycles than IDE for whatever reason

I extensively use both IDE and SCSI. People who use IDE and have
throughput problems tends to be using the drives in non-DMA mode and/or
16 bit mode. With any drive made in the past 5 years, this is usually
fixable by a kernel recompile to default to DMA transfers, or by using
hdparm, or by including specific support for their IDE chipset rather
than using "generic".  My home nforce2 based Epox mobo is an example of
this.

Regards
-- 
Martin A. Brooks, Clues Ltd
http://www.clues.ltd.uk/


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