--- "O. Hartmann" <[EMAIL PROTECTED]> wrote: > Before digging into this problem deeper with benchmarks, could anyone > explain why FreeBSD reaches this 33 MB/s limit (sounds like UDMA 33 > defaults, but on both boxes nForce4 and ICH5 controller are recognized > and show up with SATA300 or SATA150 capabilities, respective)? May I > have some knobs I'm not aware of to tune disk performance? > I think, this 33MB/sec limit comes like this: The regular copy process (I think u used "cp") reads with speed S from disk A and writes with speed S to disk B. But: While it reads, it doesnt write AND while it writes, it doesnt read.
So you might want to try this: dd if=/diskA/fileA bs=128k | dd of=/diskB/fileB bs=128k You could also try just to read or to write. Or to read&write with _independent_ processes. -Arne ____________________________________________________________________________________ The fish are biting. Get more visitors on your site using Yahoo! Search Marketing. http://searchmarketing.yahoo.com/arp/sponsoredsearch_v2.php _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"
