Time machine automatically started again, and after several days of crawling I got the message that the ‘sparsebundle was already in use’. I stopped the backup using the TM dialog box, reset my mac, router and MyBookLive and started again. Then i got the dreaded ‘Time Machine needs to create a new backup’ message and, 1 month later, it hasn’t been able to finish the process yet!Īfter about 6 days it was about 30% complete (just over 50Gb) which didn’t sound right given how long it previously took. Time Machine didn’t need to create a new backup from scratch after upgrade, and continued to add to the existing backups & history for 2 months. I upgraded to Mountain Lion 3 months ago, in the hope that it would fix the error and, briefly, things were going well. Frustratingly, this meant that the backup history never stretched very far in the Time machine ‘starfield window’ but at least I had a backup of some sort. Lion successfully backed up my system (total size approximately 159Gb) over a two day period, but every 4-6 weeks Time Machine would tell me it needed to create a new backup. Set up Time Machine over wireless network with a 1Gb WD MyBookLive attached to a new BT Homehub 3 router (UK).
I bought a new iMac 6 months ago with OS X Lion (1Gb HDD). Since that time it seems to have been stuck in a perpetual loop of trying but never successfully completing a backup, no matter what I try. The last successful backup was one month ago.
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