There's this little problem with FreeBSD that has been bugging me a bit
for a while now. There have been a couple times I've tried to mount Zip
disks or floppy drives in FreeBSD, and had the /etc/fstab set up to
mount read/write, and didn't realize that I had write protect turned
on. However, I didn't realize the write protect was turned on until I
tried writing to the drive. This caused lots of hard write errors or
some such thing, and the system eventual just said "hit any key to
reboot". I guess some buffer somewhere got full and crashed the
kernel. There's never any kernel dump, so I can't easily send debug
messages. Is there some reason that no check is done to make sure the
media is writable before writing to it?
Is some system call to check the hardware to see if its physically
writable? I figure there is. I want to start hacking at the kernel a
bit, and it seems like something simple (comparitively) would be a good
place to start. Up there on my wish list is getting a journaling
filesystem ported to FreeBSD.
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