Date: Fri, 30 Jun 2000 08:10:08 +0100 From: "Koster, K.J." <K.J.Koster@kpn.com> To: 'Jaye Mathisen' <mrcpu@internetcds.com> Cc: hackers@FreeBSD.ORG Subject: RE: Funky scheduler stuff under heavy I/O. Message-ID: <59063B5B4D98D311BC0D0001FA7E4522026D76D5@l04.research.kpn.com>
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>
> both the Master and Slave drives on the first channel of
> each controller are about 200MB's ahead of the master
> and slave drives on the second channel of each
> controller, and the gap is growing.
>
Umm. This sounds more like your controllers are doing this. You could stick
in another two IDE controllers and see if that cures the problem. You have
one of those 10 PCI bus boards, right? :-)
Come to think of it, that would still not show if it's the hardware or
FreeBSD dropping the bucket.
Just curious, but is using vinum actually improving performance? (Assuming
that's what you're trying to achieve)
I've bonnied two Maxtor DiamondMax 15GB drives in my box, and I found that
when I stripe them, performance drops to 15MB/s, whereas a single Maxtor
will fling 25MB/s onto the platter.
Kees Jan
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