In reply to:

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Another note, while poking around ... /etc/mtab shows:
/dev/hda4 /drive0 ext3 rw,journal=12 0 0
/dev/hdc4 /drive1 ext3 rw,journal=12 0 0

Should these really be mounted rw? Is this so it can update the journal file while running?

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AFAIK /etc/mtab is not used. The player explicitly mounts the drives as readonly. If you cat /proc/mounts you can see the current state of the drives which will be ro unless you have remounted them read-write.

-Mike