It's not listed in my /etc/fstab either. I don't have a /etc/mtab. I don't get this error, but I suspect that this is because /drive1 was already mounted, and hence mentioned in /proc/mounts.

If you want to put the relevant line in there, then it's /dev/hdc4 instead of /dev/hda4.

In the mean time, "mount -n -o rw /dev/hdc4 /drive1" should see you alright. You probably won't need the ",remount" (otherwise /drive1 would have been in /proc/mounts, no?).

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-- roger