В сообщении от 4 августа 2010 20:45:26 вы написали: > on 04/08/2010 15:08 Alex V. Petrov said the following: > > Hi All! > > > > $ dd if=/dev/random of=/tank/test bs=3M count=1000 > > /dev/random is slow.
On single disk (UFS) speed of write faster: $ dd if=/dev/random of=/home/alex/temp/test bs=3M count=1000 1000+0 records in 1000+0 records out 3145728000 bytes transferred in 75.778427 secs (41512184 bytes/sec) Result for /dev/zero: $ dd if=/dev/zero of=/tank/test bs=3M count=1000 1000+0 records in 1000+0 records out 3145728000 bytes transferred in 113.110421 secs (27811124 bytes/sec) In Krusader speed copying files from a single disk to an pool of about 8 MB/s Fragment of `systat -v 1` in proces copying: Disks ada0 ada1 ada2 ada3 ada4 KB/t 0,00 122 44,35 32,89 48,50 tps 0 54 56 53 54 MB/s 0,00 6,42 2,42 1,70 2,55 %busy 0 11 7 4 82 ----- Alex V. Petrov _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"