Well, I've made the jump. Created a raidz2 (dual parity) pool using the 6 disks I've been testing lately. Transferred 4TB to the system, and now running my first scrub!
sudo zpool status
pool: bigpool
state: ONLINE
scan: scrub in progress since Thu Mar 1 07:06:02 2012
64.6G scanned out of 4.22T at 73.3M/s, 16h30m to go
0 repaired, 1.50% done
config:
NAME STATE READ WRITE CKSUM
vault ONLINE 0 0 0
raidz2-0 ONLINE 0 0 0
sdf ONLINE 0 0 0
sdg ONLINE 0 0 0
sdh ONLINE 0 0 0
sdi ONLINE 0 0 0
sdj ONLINE 0 0 0
sdk ONLINE 0 0 0
Now I have to admit, 73 MB/s is what I'll call slow considering the speeds I had been seeing in my tests, and the fact I'm running across two eSATA controllers ( 3 drives each ), however, the speeds are going up everytime I check the status:
scan: scrub in progress since Thu Mar 1 07:06:02 2012
85.5G scanned out of 4.22T at 75.3M/s, 15h59m to go
This tracks a hell of a lot slower than my RAID controller's RAID-6 array surface scan.
I'll do some i/o tests later. Did a dd read of a 500MB file for a quick test:
532132088 bytes (532 MB) copied, 5.10293 s, 104 MB/s
Not bad, not shocking though.
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