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Forum Discussion
Time Machine fails most of the time on one Mac
Since updating to Lion and the new firmware (RAIDiator 4.1.8 [1.00a043] ) for my ReadyNAS duo one of my Macs, and only one, frequently fails to backup successfully. The error message Time Machine ulti...
mdgm, thanks for the info on the AEBS-based backups. Based on your information, it seems like there is no connection between the 2 issues.
I'm running the latest RAIDiator, 4.2.19. I've done some more research since my last post, and this seems to be an issue common to other drives, not just ReadyNAS, including Time Capsule drives. Namely, that TM isn't consistent in automatically unmounting the TM disk (sparsebundle) after a back up is complete. No one seems to have come up with a perfect solution, but there are a couple of workarounds that seem to make sense:
1) Avoid opening or using TM during a backup.
2) Exclude the location of the sparsebundle from Spotlight (in case Spotlight is trying to index the sparsebundle when TM attempts to unmount it). Similarly, some have speculated that any app that may access the sparsebundle in the background may prevent TM from unmounting the sparsebundle.
A couple of other observations: A) I haven't noticed a difference between wired/wifi. TM seems to fail about as often using either one. B) Sometimes the computer won't eject the volume using the typical right-click procedure. Then, I have to go into terminal to unmount the disk. I've done the unmount using sudo, but I did read one post where the writer suggested that diskutil would suffice. I haven't had an opportunity to try diskutil in this situation yet.
I've done #1 and #2, above, and will report later if either seems to help. If others try these, let us know your results, or other solutions/workarounds you've found.
I'm running the latest RAIDiator, 4.2.19. I've done some more research since my last post, and this seems to be an issue common to other drives, not just ReadyNAS, including Time Capsule drives. Namely, that TM isn't consistent in automatically unmounting the TM disk (sparsebundle) after a back up is complete. No one seems to have come up with a perfect solution, but there are a couple of workarounds that seem to make sense:
1) Avoid opening or using TM during a backup.
2) Exclude the location of the sparsebundle from Spotlight (in case Spotlight is trying to index the sparsebundle when TM attempts to unmount it). Similarly, some have speculated that any app that may access the sparsebundle in the background may prevent TM from unmounting the sparsebundle.
A couple of other observations: A) I haven't noticed a difference between wired/wifi. TM seems to fail about as often using either one. B) Sometimes the computer won't eject the volume using the typical right-click procedure. Then, I have to go into terminal to unmount the disk. I've done the unmount using sudo, but I did read one post where the writer suggested that diskutil would suffice. I haven't had an opportunity to try diskutil in this situation yet.
I've done #1 and #2, above, and will report later if either seems to help. If others try these, let us know your results, or other solutions/workarounds you've found.
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