> 25.9 MB/s Even Linux is pretty slow.
> Transfer rates: > outside: 102400 kbytes in 0.685483 sec = 149384 kbytes/sec > middle: 102400 kbytes in 0.747424 sec = 137004 kbytes/sec > inside: 102400 kbytes in 1.051036 sec = 97428 kbytes/sec That's more like it. I assume these numbers are reading. You should get numbers nearly this high when writing. Can you try writing to the bare drive without a filesystem? time dd if=/dev/da0 of=/dev/null bs=124k count=250000 time (dd if=/dev/zero if=/dev/da0 bs=124k count=250000; sync) Between writing more data than the size of memory and the sync, this should hopefully reduce any buffering effects down into the noise and make the numbers more comparable between FreeBSD and Linux. (and more honest) Also eliminates any effect from the filesystem, which will be different between FreeBSD and Linux. Writing should be almost as fast as reading. Is the disk healthy? Smartctl might give a clue. If the disk is healthy and you still get numbers that indicate one write per rev without a filesystem, then the question is why does the driver claim queueing but not deliver it? _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
