> What benchmark program did you use for the test? Also, was there any other > programs running at the same time? Was the machine in single-user (init 1) > state? hello :-) dd if=/dev/zero of=/share/raid6/1Gb bs=1024 count=1000000 1000000+0 records in 1000000+0 records out 1024000000 bytes (1.0 GB) copied, 12.1632 s, 84.2 MB/s dd if=/dev/zero of=/share/raid6/10Gb bs=1024 count=10000000 10000000+0 records in 10000000+0 records out 10240000000 bytes (10 GB) copied, 142.021 s, 72.1 MB/s That graphic with palimptest (gnome-disk-utility). No other applications uses raid (I'm on init 2 but samba, ftp, and other daemons are off) iostat not show me any activity by raid, so I think there is not programs that runs on array. thanks :-) Pol -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html