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Cc: freebsd-performance@freebsd.org, freebsd-questions@freebsd.org
Subject: Re: (S)ATA performance in FBSD 6.2/7.0 
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> another while the box didn't do anything else than copying. I watched the 
> copy process via 'systat -vmstat 1' and realized, that the value of 'KB/t' 
> never go byond 128 (128kb buffer limit?). But more frustrating, I never got

what's wrong? FreeBSD uses 128k limit by default.

edit /usr/src/sys/sys/param.h

and change

#define MAXPHYS         (128 * 1024)   /* max raw I/O transfer size */


to say

#define MAXPHYS         (1024 * 1024)   /* max raw I/O transfer size */