On Sun, 10 Jan 1999, Bjarni R. Einarsson wrote:
> The box is a dual PII, with a 2.0.36 SMP kernel, with everything compiled in
> (not using modules). I'm using the raid drivers that were included with
> Linux 2.0.36, and the raidtools included with RedHat 5.2
> (raidtools-0.50beta10-2.i386.rpm).
>
> I'm attempting to raid together four 4.3GB SCSI disks (two disks connected
> to each of two Adaptec 2940 controllers). I wanted to create 3 partitions,
> each spread across these four disks, but to get familiar with the raid
> configuration I started working with only two partitions.
...
> For some reason though, when I tried to activate the second set, the kernel
> complained, giving me the error in this message's subject line. It didn't
> matter which set I activated - both worked fine on their own, but I couldn't
> get them both active at once. Is it impossible to have multiple raid5 sets
> active at the same time? (And if so, shouldn't this prominently
> documented?)
My 2 cents:
I've been running two RAID5 and one RAID0 set since raidtools v0.41. I
skipped v0.50 and went right to alpha v0.90. You might consider doing the
same, as 0.90 has been quite solid for me.
Your configuration is unclear to me. Is it two partitions per RAID
set, or two partitions per drive x 4 drives? Posting your raid
configuration file(s) would help.
If you are trying to run RAID5 across two partitions, remember that
RAID4/5 needs a parity drive/partition in addition to the data partitions.
You will need at least three drives/partitions to use these RAID levels.
Not sure if this would give a thread error. Molnar et al can certainly
provide a better answer.
Geof
DISCLAIMER: The comments above are my own and may not represent the views
of my employer.
+-------------------------------+-------------------------------------------+
: Geoffrey P. Goodrum : US Department of Commerce :
: +1-301-457-5100 : NOAA/NESDIS National Climatic Data Center :
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