Lars NoodC)n wrote:
I'm looking to set up a test unit this summer to try RAID 1+0 or 3+0.
The goal is to be able to stream data quickly but tolerate loss of at
least one disk at a time.
It looks like there are three options supporting at least RAID level 0
and 1, can/should any of these be stacked yet?
softraid
http://www.openbsd.org/cgi-bin/man.cgi?query=softraid
raidframe
http://www.openbsd.org/cgi-bin/man.cgi?query=raid
ccd
http://www.openbsd.org/cgi-bin/man.cgi?query=ccd
It looks like one disk (or CF) is needed for a base OpenBSD system, and
the other 4+ for RAID. Is that the best way to ensure unattended booting?
Also, what kind of data would you want back on the tests? It's early
enough that I can work it into the plans.
Regards,
-Lars
Hey Lars,
I'm using raidframe with 1+0. From my reading of the raidctl(8) man
page it looks like you can compose raid sets from any valid devices,
including other properly configured raidframe devices. If you're
interested I'll send you my /etc/raid*.conf files. I'm sure you know
this but for posterity, read the raidctl(8) man page closely.
Everything is in there. Nevertheless, it took me two passes to figure
out how to get auto configuration working correctly.
As for test results, I'd be interested in throughput performance when a
drive is taken out of the pool (failed) and throughput performance while
the array is rebuilding once a spare has been brought online.
Cheers,
Aaron
