Directly after buying this baby I had no problems using the built-in Time Machine compatibility. Then the problems began. Back then I wasn’t able to associate an application directly with the failing of the backup. I worked around the problem using the hacks to use any NAS as a Time Machine backup volume.
However, a few days ago I bought a new iMac and after copying over my data and installing all the applications I use I wanted to setup the Time Machine backup. Unfortunately I had no further luck than the last time, the same errors (error 17 and error -6508 while creating the Sparsebundle) occurred. For testing purposes I set up my "old" iMac anew and… the backup works perfectly. My old machine was just setup with OS X 10.6, all the updates available and iLife '11. There the backup works, on my new machine with a newly created user profile it fails.
I’m running such applications as MacFUSE and Total Finder which are known to integrate very deeply into the operating system. I disabled those, still no luck. Then I started killing background processes, but still… no luck.
I’d love to hear your ideas as I don’t know any further. Thanks.
Backups.backupdb? If not, check to see if you can disable ownership on that volume, make your user account on your new Mac the owner of all files on there, or, if all that fails, reformat the backup volume and start anew. – Daniel Beck♦ Jun 3 '11 at 10:52