For the last couple of weeks I've been having a problem with my hard
drive spontaneously "misplacing" about 20 GB of space of my primary
partition. I'll start getting out of disk space errors, do a df, and see
that I have something like 200 KB of free space. I'll shut down, reboot,
and have 20 GB of free space.

What I'm guessing, is that it's somehow related to my RAID setup. I'm
running a 3ware RAID board with two 45 GB drives in RAID0. The partition
in question is 81 GB and is using ReiserFS. The few times before that
this happened I didn't remember to immediately think of what it was I
had been doing before, but the most recent time it was right after I had
rebooted from having started up Windows 2000. (Same array, 8 GB
partition) My working theory for the moment is that somehow the RAID
board isn't resetting properly between OS's or some such. However, I
don't know much about how these boards work, so this is all pure
speculation.

One other observation is that whenever this happens my system slows to a
crawl. I've run out of disk space on a linux system before, but it's
never had this much of an effect. Everything either runs extremely
slowly or stops responding altogether. I had thought that maybe it was
some program going crazy and dumping data either to a log file or a tmp
file, but I've checked both /var/log and /tmp every time it's happened
and they are usually contain no more than a few MB a piece.

Any suggestions on where to start looking?
-- 
Alex Malinovich
Support Free Software, delete your Windows partition TODAY!
Encrypted mail preferred. You can get my public key from any of the
pgp.net keyservers. Key ID: A6D24837

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