Dan Naumov wrote: > [j...@atombsd ~]$ dd if=/dev/zero of=/home/jago/test2 bs=1M count=4096 > 4096+0 records in > 4096+0 records out > 4294967296 bytes transferred in 143.878615 secs (29851325 bytes/sec) > > This works out to 1GB in 36,2 seconds / 28,2mb/s in the first test and > 4GB in 143.8 seconds / 28,4mb/s For the record, better results can be seen. In my test I put 3 Seagate Barracuda XT drives in a port multiplier and connected that to one port of a PCIe 3124 card.
The MIRROR case is at about the I/O bandwidth limit of those drives. [r...@kraken ~]# zpool create tmpx ada{2,3,4} [r...@kraken ~]# dd if=/dev/zero of=/tmpx/test2 bs=1M count=4096 4096+0 records in 4096+0 records out 4294967296 bytes transferred in 20.892818 secs (205571470 bytes/sec) [r...@kraken ~]# zpool destroy tmpx [r...@kraken ~]# zpool create tmpx mirror ada{2,3} [r...@kraken ~]# dd if=/dev/zero of=/tmpx/test2 bs=1M count=4096 4096+0 records in 4096+0 records out 4294967296 bytes transferred in 36.432818 secs (117887321 bytes/sec) [r...@kraken ~]# _______________________________________________ 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"