Sorry for cross posting?
I am trying to setup a decent RAID (0+1 or 1+0 or 5) and there SEEMS to
be no approved method. (4 disks -- I usually like stripe on top of
mirrors.)
I believe that I have done my homework.
What are my options?
softraid (bioctl) cannot handle stripe on mirrors:
I can easily create 2 mirrors and they survive reboot.
I can create stripe on those mirrors (works -- can create files), but it
does not survive reboot.
Message is device not configured.
Both ccd and RAIDframe are decprecated (FAQ 14.13):
> Software Options
> OpenBSD supports softraid(4), a framework supporting many kinds of I/O
transformations, including RAID and encryption disciplines. Softraid(4)
is managed using bioctl(8).
>
> OpenBSD also includes RAIDframe (raid(4), requires a custom kernel),
and ccd(4) as historic ways of implementing RAID, but at this point
OpenBSD does not suggest implementing either as a RAID solution for new
installs or reinstalls.
"OpenBSD does not suggest implementing either"
Also, RAIDframe requires a custom kernel and we all know that GENERIC is
preferred.
RAID 5 is experimental (man bioctl):
> CAVEATS
> Use of the CRYPTO & RAID 4/5 disciplines are currently considered
> experimental.
>
> OpenBSD 4.9 December 22, 2010
OpenBSD 4.9
>
Also, bioctl would not let me create a RAID 5 set:
# bioctl -iv softraid0
# bioctl -c 5 -l /dev/sd1a,/dev/sd2a,/dev/sd3a,/dev/sd4a softraid0
bioctl: BIOCCREATERAID: Invalid argument
# bioctl -iv softraid0
# dmesg|tail
sd11 at scsibus6 targ 0 lun 0: <OPENBSD, SR RAID 0, 004> SCSI2 0/direct
fixed
sd11: 3815436MB, 512 bytes/sec, 7814014721 sec total
sd11 detached
scsibus6 detached
sd10 detached
scsibus5 detached
sd9 detached
scsibus4 detached
softraid0: not part of the same volume
softraid0: can't attach metadata type 0
Thanks,
Steven
