Why isn't UUID working with the mount command/fstab in OS X Lion?

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hailunix Author

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Why isn't UUID working with the mount command/fstab in OS X Lion?

Trying to set up an external drive to mount automatically at boot.

# cat /etc/fstab

UUID=55E542B9-60B5-3F47-B845-D9DF3EC30D92 /tmp/foo hfs rw,noauto 0 0

# diskutil info /dev/disk2s2 | grep UUID

Volume UUID: 55E542B9-60B5-3F47-B845-D9DF3EC30D92

# mount /tmp/foo

GetMasterBlock: Error 2 opening UUID=55E542B9-60B5-3F47-B845-D9DF3EC30D92

mount_hfs: No such file or directory

Tutorials I've found seem to indicate this should work but I'm not having any luck. The diskutil mount command works fine, but I'm trying to get this automated without writing my own LaunchAgent to run some shell script. My options are rw,noauto because right now I'm just experimenting and I'm not really worried about mounting at boot, this isn't even the real disk i'll end up using.

Mac OS X (10.7.2)

Posted on Jan 25, 2012 9:45 AM

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Answer 1

twtwtw

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Jan 26, 2012 9:52 AM in response to hailunix

I assume you've read this thread?

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Answer 2

hailunix Author

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Jan 26, 2012 11:57 AM in response to twtwtw

I read that thread but, maybe I'm missing something, I didn't see an actual solution in the thread. That being said, technically the man pages don't really claim mount actually supports UUID, only fstab. I suppose diskutil probably reads it for a reference as well since mounting via diskutil does indeed work. Unless someone comes up with a way to do with with mount I plan on just using diskutil in a LaunchAgent and making sure the correct settings are on to make sure the filesystem stays mounted without users logging in.

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Answer 3

twtwtw

Level 5

4,948 points

Jan 26, 2012 12:19 PM in response to hailunix

If I were you, I'd just go ahead and use diskutil. the problem seems like bug report territory, and it's such an unusual scenario - how many people need to mount a disk when no users are logged in? - that it's not likely to get rapid action. Particularly when there's such an easy alternative...

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Answer 4

hailunix Author

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Jan 26, 2012 12:34 PM in response to twtwtw

Indeed. If you're in a situation like this encountering a edge case and you're already monkeying around with fstab it's entirely possible you have the ability to set up something with launchd, I was just throwing a hail mary hoping for the easy way out 😉

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