I tried to follow these instructions:
But after typing in the hdiutil command I only get one partition:
bash-3.2# hdiutil attach -nomount -noverify -noautofsck /Volumes/Data/Ulfs\ iMac.sparsebundle/ /dev/disk1
So all the steps after this command are not available to me.
Afterwards I tried to mount the sparse bundle using the disk utility. After several hours the image appeared in the sidebar of my disk utility. There I tried to execute the repair volume function, which took about two hours. But still I'm not able to mount the image. I tried all this from two different Macs.
Is there anything left I could do to save my backup history?