On Sun, 30 Nov 2014, Emile `iMil' Heitor wrote:
$ dd if=/dev/zero of=/export/imil/tmp/test bs=1m count=1000
1000+0 records in
1000+0 records out
1048576000 bytes transferred in 42.619 secs (24603486 bytes/sec)
Turns out performances are not *that* bad considering the disks I'm using[1][2]
# sectPerSU SUsPerParityUnit SUsPerReconUnit RAID_level_5
64 1 1 5
~
# newfs -O2 -b64k -I dk0
This might not be the best configuration; you've got two RAIDframe
SUs per FFS block.
So you'd recommend to run newfs with 32k as the block size?
Regardless of hardware/software configuration, RAID 5 is going to have
horrific performance. It is also nearly useless in terms of redundancy. If
you're looking for good performance and redundancy, RAID 10 is the way to
go.
