BackupMacToMars

From: http://forum1.netgear.com/showthread.php?t=68349&page=3

I've been following this thread and I'm happy to report Time Machine is backing up to MyComputers right now! I just figured it out after finding out that there is now a command line tool tmutil for Time Machine. So in the Time Machine preference pane I wasn't able to make it work but with this command line tool I could.

The basic directions are you create a sparse disk image, copy it to MyComputers, mount it, and issue the tmutil command to set the mounted sparse image as the destination for Time Machine.

Here's the detailed instructions. I don't know if every step is required (like #5) but this is what I did and it's working. Also I don't know if Time Machine will mount the sparse image automatically for me in the future or if I will have to mount it myself first... but I'll know more later. I just thought I'd post this so your an get it working too.

1. create a local sparse disk image. you must create this on local disk as can't do this on nas. Open the Terminal and enter the following:

Code:

 cd ~/Desktop
 hdiutil create -size 300g -library SPUD -fs HFS+J -type SPARSEBUNDLE -volname "Backup of MacBook Pro" mbPro_3c0754060d92.sparsebundle
	-size is size using g at end to specify gigabytes
	-volname is the name of it when mounted
	the disk image name consists of the computer's share name, underscore, and its ethernet address

2. Mount MyComputers disk on your machine using smb

Code:

 go to the Finder
 under the "Go" menu select "Connect to Server"
 enter: smb://stora/MyComputers

3. copy the image to the root of a volume on the nas. From the Terminal enter:

Code:

 cp -r mbPro_3c0754060d92.sparsebundle /Volumes/MyComputers

4. delete the sparse bundle created on your desktop. From the Terminal enter:

Code:

 rm mbPro_3c0754060d92.sparsebundle

5. Enable time machine to support unsupported volumes (eg. the network share). From the Terminal enter:

Code:

 defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1

6. Mount the sparse image you just copied to MyComputers

7. set the mounted sparse image as the time machine destination. From the Terminal enter:

Code:

 sudo tmutil setdestination -p /Volumes/Backup\ of\ MacBook\ Pro