[3862] in linux-scsi channel archive
[BACK ON TOPIC] SCSI & IDE
daemon@ATHENA.MIT.EDU (Mr M S Aitchison)
Thu May 7 18:54:08 1998
Date: Fri, 08 May 1998 10:51:20 +1200
From: physmsa@cantua.canterbury.ac.nz (Mr M S Aitchison)
To: linux-smp@vger.rutgers.edu
Cc: linux-scsi@vger.rutgers.edu
> I don't see this, so long as you are talking a single drive system. IE
> I have an IDE 4 gig drive in my gateway notebook, and had a similar
> machine with a single SCSI drive a while back, and the speeds were pretty
> much identical.
Suppose you start with a single *IDE disk, fast and cheap, on an SMP
Linux system you assume won't need much file access 'cause it is going
to be number crunching all day. Then you need more disk
capacity/performance, so you add SCSI. Assuming you use hdparm for
best IDE performance will it still drag down the performance of the
system?
I suppose it depends on what the EIDE is used for. If it is just
"system files" (/var, /usr, etc) or just swap, could it impair CPU
performance (given the Linux 2.0 system call "bottleneck"
especially)??
Would you REMOVE the IDE?
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Mark Aitchison, \_ Phone: +64 3 364-2947 home 337-1225
Dept of Physics & Astronomy, </ Fax: +64 3 364-2469 or 364-2999
University of Canterbury, /) Web: www.phys.canterbury.ac.nz/~physmsa
Christchurch, NEW ZEALAND. (/' E-mail: M.Aitchison@phys.canterbury.ac.nz
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