10.5: Set up Time Machine on a NAS in three easy steps

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10.5: Set up Time Machine on a NAS in three easy steps
Authored by: ybizeul on Wed, Apr 30 2008 at 8:39AM PDT

I do not understand the point of the command line stuffs...

I just took Disk Utility in Leopard, create a sparsebundle disk image from here, naming it according to the name of my machine and en0 MAC address.
The thing is, like time machine, Disk Utility can't create the .sparsebundle on the remote volume directly, so create it on your desktop, and copy it manually in the finder.
In terminal : defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1
If you get troubles in Console saying that this is not the correct time machine backup disk, try removing the file named .xxxxxxxxxxxx in the root of your share, and test again.
Concerned about security ? You can even crypt your DMG !!! Yes, create your sparsebundle with 128bit AES encryption, it works perfectly. The trick is to save key in your keychain, when mounting the DMG manually, then go to Keychain, and copy/paste the entry from your user keychain to the system keychain.