On Mon, 18 Jan 1999, Jeremy Wohl wrote:
> On Mon, Jan 18, 1999 at 02:43:31PM -0800, Aaron D. Turner wrote:
> > Performance is going to *suck* with 5 IDE disks, assuming of course you
> > can actually get 3 IDE controllers to work in the same box.
>
> OK, what's the bottleneck here? The track-to-track seeks, bandwidth,
> cpu use seem to be reasonable on top-line ide vs. scsi disks. The
> drivers? what?
The ATAPI protocol stinks. The biggest problem is the inability to have
multiple outstanding IOs per channel, and per device. The CPU use is much
higher for EIDE. Unfortunately, most benchmarks don't simulate real world
usage, like multiple, random outstanding IOs. Please don't post your
"bonnie" scores here, unless your application is to run bonnie all the
time.
> -jeremy
>
>
Tom
