>>OK. Does it show up in /proc/mounts, by any chance? (I'm presently feeling distrustful of mount.) I'm not sure what partprobe has done -- >> why >>anything changed. Does "fdisk -l /dev/hde" (dash ell) output look sane? > It's not showing in /proc/mounts. On the other hand the "fdisk -l /dev/hde" output looks perfectly normal. Very strange indeed, especially since it will mount just fine if I use the FC4 kernel or Knoppix. Here are a few more updates after more troubleshooting. Removing the boot flag from the partition seems to have stopped the invalid block device message. Now, I can run all of the e2 utlities including e2fsck (which returns a clean bill of health), but it still won't mount. It's giving me the this message consistently "mount: /dev/hde1 already mounted or /mnt/tmp_dir busy". One other thing that I noticed was that qtparted is throwing an error message that says "Error: File system has an incompatible feature enabled." Regular parted and fdisk do not seem to produce the error. And the strangest part of all is that it continues to mount fine outside of FC5. -- Brian