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: ngb on Fri, Apr 25 2008 at 11:31AM PDT

There are some problems with the command as posted.

there is no -library option for hdiutil (according to the man page)
the default size in in blocks, but can be specified in gigabytes using "g"
the -fs option should be "HFS+J", not "Journaled HFS+"
the -volname option was left out, but should be "Backup of $MACHINENAME" (see the link in the second comment)

With these corrections, the command should read like this:

hdiutil create -size $SIZEg -fs HFS+J -type SPARSEBUNDLE -volname "Backup of $MACHINENAME" $MACHINENAME_$MACADDRESS.sparsebundle

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10.5: Set up Time Machine on a NAS in three easy steps
Authored by: theilgaard on Fri, Apr 25 2008 at 11:59AM PDT

As from reading the man-page for hdiutil, I think, that -library SPUD, actually meant -layout SPUD (at least this option has a SPUD parameter).

So the full command will be:

hdiutil create -size $SIZEg -fs HFS+J -type SPARSEBUNDLE -layout SPUD -volname "Backup of $MACHINENAME" $MACHINENAME_$MACADDRESS.sparsebundle

Correction to the corrections
Authored by: paulio on Fri, Apr 25 2008 at 3:19PM PDT

This will give you info on the library option:

hdiutil create -help

No, it is not in the man page.

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