On Sun, May 07, 2006 at 05:57:43PM +0200, Tonnerre LOMBARD wrote:
> Salut,
> 
> It seems that disk I/O is massively slow under NetBSD 3.0 on amd64. I am
> running it on a DualCore Opteron 175 machine with 2G RAM (Sun Fire X2100),
> and when I e.g. dd if=/dev/zero of=/some/ffsv2/path bs=16k count=16k, the
> average write speed is around 5 MB/s on a 7.2krpm SATA disk.
> 
> Is this a tuning problem or some known bug or do we have to track the
> problem down? (It doesn't behave much better on 3.99.18 with the new
> BUFQ stuff enabled either) It doesn't appear to be a problem of processing
> power, since the processing power used is usually around 1.5% of one CPU.

What is your disk system ? Maybe your SATA controller isn't properly
supported.
Also, you may have better speed using 64k blocks with dd

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--