After upgrading to RedHat 7.3, my floppy drive will only mount read-only. It worked fine under 7.2, and works fine under DOS. I've tried other disks, made sure they aren't write-protected, and looked as carefully as I can at fstab. Ideas?

There are two ways to make a mounted media read-only: Either via the "ro" mount option, or via file/dir permissions.

For the mount option, type "mount" to see a list of mounted volumes, and look at the entry for your floppy. You should either see "rw" (read-write) or "ro" (read only). If you see ro there, your problem is probably in fstab. Make sure it doesn't say "ro". Try mounting it manually with the mount command (maybe with -o rw), and see what happens. Also, check to see what happens when you're doing the mount as root, if you're usually mounting it as a user.

For file permissions... Since floppy disks usually are fat formatted, and fat doesn't really have permissions (not unix style anyway), linux has the umask mount option to figure out which permissions to set/not set, as well as the uid and gid options, to specify who should own the files. Anyway, to make a long story short, check the file permissions and ownerships, and edit fstab to make the floppy mount the way you want. A typical fstab options entry for fd0 is "noauto,user,owner".