Paul's right, Bonnie is your only man, I use software RAID1 [external hot-plug SCSI box] for the oul home directories and its super.
In fact, doing some testing, new disk, forgot that I'd moved one drive to another slot [which affects the ID's], fdisk'ed the wrong drive, didn't matter coz I made a new /etc/raidtab file, added the drive to the config,
# raidhotadd /dev/md0 /dev/sdc
and see it rebuild via...
# cat /proc/mdstat
Bit of advice, you are not 100% redundant until the fat lady sings, coz if your good drive fails during the rebuild of the other, bye bye data baby. But thats true of hardware raid too.
has anyone mentioned that hdparm -t isnt a very reliable benchmark?
try bonnie++ or tiozone (or whatever it's called).
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