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Re: RAID Support?

David Morris <lists@morris-clan.net> wrote:
> Thanks for all the responses, sounds very encouraging...now all I need is
> to get the hardware and experiment (software RAID, BTW).  
> Anyone have any experience with the 2.4 kernel and raid on sparcs?

We have an Ultra 30 (UltraSparc) with three 9GB drives running software
raid-0.  That partition is used as temporary space for amanda backup files,
so I wanted fast access.  It manages to pull off a 30MB/s transfer rate,
which seems pretty good to me considering the age of the drives, but it
might not be all that great in the grand scheme of things.

I'm not sure if this is still a problem, but when I started, I was forced
to access the raw drives, rather than using partitions (ie, /dev/hdb
instead of /dev/hdb1).  The partition maps on the second and third drives
would get toasted if I didn't do that.  I've heard that accessing the whole
disk this way is required if you only have one big partition on the disk,
and that disks with multiple partitions should be safe, but I don't really
want to test it ;-)

        Mike Hicks   [mailto:mhicks@csom.umn.edu]
   Unix Support Assistant    | Carlson School of Management
Office: 1-160  Phone: 6-7909 |   University of Minnesota

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