I would have responded to this thread earlier but I was out late last
week. We had tons of problems with our ldm server running Linux last
fall which sounds very similar to the behavior you are describing. I
had migrated our LDM from Freebsd to Linux (Slackware, not that it makes
much difference) and had huge problems with I/O waits bogging the entire
system down. ...
What version of the kernel were you running? For example
$ uname -r
Versions of the 2.6 kernel earlier than 2.6.10 (I think) appear to have
a very bad I/O performance bug.