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I'm trying to chown a volume, but I get "Operation not Permitted" no matter what permissions I change. I'm using OS X Leopard.

users-mac-pro:~ users$ chown 0:0 /Volumes/Snowfx
chown: /Volumes/Snowfx: Operation not permitted
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And why would you want to do that? What problem are you really trying to solve? – slhck Apr 6 '12 at 10:08
I'm trying to test the permissions of this volume. I have full read/write permissions and it's not locked, but chown still won't work. – Iris Apr 6 '12 at 10:12
up vote 2 down vote accepted

I believe you need to prefix the command with sudo.

However I don't see a practical reason for doing what you want. In most cases you want to leave volume's permissions or even ownership alone. As always, be careful with what you do when using sudo.

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