Re: RAID & Hard disk performance

[Dave Watkins <debian-isp@snorks.dyndns.org>]

Not to start a holy war, but there are real reasons to use SCSI.

The big ones are

Much larger MTBF, faster access times due to higher spindle speeds, better 
bus management (eg 2 drives can perform tasks at once unlike IDE), Hot 
Swapable (This is HUGE) and more cache on the drive.

I'll stop now before I start that war :-)

Dave

At 11:20 AM 11/4/01 +1100, you wrote:
> <quote who="Russell Coker">
>
> > There's a number of guides that tell you about hdparm and what DMA is, 
> but if
> > you already know that stuff then there's little good documentation.
>
> "Oh bum." :)
>
> > Then on the rare occasions that I do meet people who know this stuff
> > reasonably well they seem to spend all their time trying to convince me 
> that
> > SCSI is better than IDE (regardless of benchmark results).  :(
>
> Heh, there's a religious war waiting to happen.
>
> > > [1] http://people.redhat.com/alikins/system_tuning.html
>
> I've just found that iostat (in unstable's sysstat package) supports
> extended I/O properties in /proc if you have sct's I/O monitoring patches.
> Unfortunately, the last one on his ftp site is for 2.3.99-preBlah. I sent an
> email to lkml last night to see if there's a newer patch - I'll follow up
> here if so.
>
> Thanks Russell,
>
> - Jeff
>
> --
>                            Wars end, love lasts.
>
>
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