I also have a HPFS that I actually use for sharing with Linux. Volume label is SHARE. HPFS in some ways is better with Linux as it simply works, even symlinks from OS/2. In the file manager, under Devices, the JFS volumes appear as, eg, 17 GB Volume while the HPFS partition shows as SHARE.
Really I should add it to fstab and mount it under /home.
The mtab entry,
/dev/sda7 /media/dave/SHARE hpfs rw,nosuid,nodev,relatime,uid=0,gid=0,umask=022 0 0