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Das ist nicht das einzige Problem. Wenn Time Machine zum ersten mal startet wirst du feststellen, daß es auch gefundene Netzlaufwerke nicht akzeptiert. Da wird der Name des Rechners und die MAC Adresse des Netzwerkadapters zur Adressierung benutzt. Man kann das händisch nachvollziehen aber das ist nicht ganz trivial.
aus
http://www.kremalicious.com/2008/06/ubuntu-as-mac-file-server-and-time-machine-volume/
aus
http://www.kremalicious.com/2008/06/ubuntu-as-mac-file-server-and-time-machine-volume/
Problems with creating the backup disk image
If time Machine says “The backup disk image could not be created” during the first backup attempt you can do the following to avoid this problem and some others (backup fail due to permissions):
In short, you have to create the backup disk image on your Desktop and copy it to your mounted Time Machine volume. But Time Machine creates a unique filename for the disk image and we can find out this name with a little trick:
First open up the Console from your Applications > Utilities folder and open the Time Machine preferences. In Time Machine preferences set your backup volume back to none. After that reselect your mounted Time Machine volume. The counter should start and Time Machine’s big button will change to on. When the backup tries to start and fail have a look at your Console (Click All Messages in the sidepane). There should be a line tellung you the name of the disk image:
Creating disk image /Volumes/TimeMachine/computername_0014e3856bd0.sparsebundle
The computername should be the name you have assigned to your Mac. Now just click on that line and hit command + C to copy the message.
Now Open Disk Utility from your Applications > Utilities folder and click on New Image in the toolbar. Now just hit Command + V in the Save As field and remove everything before the name of the sparsebundle.
Update: The secret number Time Machine adds to your computer name is nothing more than your network devices MAC address, as Simulacrum found out in the comments. As he points out you can open up Network Utility and under the info tab you’ll find a field called “Hardware Address”. Just remove the colons and you have the number Time Machine adds to the disk image name.
In the field volume name write Backup of computername. Now first chose sparse bundle disk image as the image format and adjust the volume size to the size of your internal harddrive (minimum, choose more if you like) afterwards. Remember that Disk Utility won’t let you make a bigger image file as you have physical hard drive space available if you don’t chose sparse bundle disk image as the image format first. For reference have a look at this screenshot:
Select your Desktop as destination and click create. After the creation is finished drag the created disk image to your mounted Time Machine volume (you can delete the disk image on your desktop when copy is finished). Finally go to Time Machine preferences and start your backup again and everything should work as expected now. After the first backup (this can take a long time depending on your harddrive) you can unmount your Time Machine volume and the next time Time Machine starts it will grab and mount the sparse bundle disk image automatically (with “Backup of computername” as the volume name).
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