Snapshot in subdirectory lost when removing parent directory

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Hi,

When creating a snapshot in a subdirectory, this gets lost when the
parent directory is removed, see the following command sequence:
http://www.pastebin.org/302447

Now, i had a snapshot of the directory "beta" holding my really
important file "randomfile.txt".

Since creating a snapshot of the root directory is not possible i could
loose all my data when someone hacks a box and does a "rm -rf /".

What would you advice in this scenario?

1. Create snapshots of the RADOS pools?
2. Never mount the root directory, but a subdir (mount x.x.x.x:/subdir)
3. Prevent your box from being hacked ;-)

Thanks!

-- 
Met vriendelijke groet,

Wido den Hollander
Hoofd Systeembeheer / CSO
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