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Sudden TimeMachine problem
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Forum Regular
Join Date: Sep 2007
Location: Japan
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Offline
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Been using TimeMachine for some time backing up to an external 2T LaCie drive on a 250GB partition. But yesterday I got the following message: "This backup it too large for the backup disk...." Yet I have chosen to have the oldest backups deleted when the disk is full. The full message says something like there is 13GB left, but the backup requires 26GB, and so I should remove some files etc to make room.
I used DiskUtility to repair the disc without success, and I've repeatedly tried backing up without success, always getting the same message. Since it happened I upgraded to 10.7.3 but this was no help either. I've been backing up for about 6 months without a problem on this partition until now.
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Moderator
Join Date: Oct 2001
Location: San Jose, CA
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Offline
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Important info that you didn't provide: what's the size of the disk/partition you are trying to back up?
Steve
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Celebrating 10 years and 4000 posts on MacNN!
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Forum Regular
Join Date: Sep 2007
Location: Japan
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It's a 250GB partition, which I did state. The drive is divided into 3 partitions of 1.1TB, 600GB and 250GB.
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Moderator
Join Date: Oct 2001
Location: San Jose, CA
Status:
Offline
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You stated you were backing up *to* a 250 GB partition. You didn't say that was also the size of the partition you were backing up.
In most cases, it's better to have the backup drive/partition be bigger than the drive/partition you are backing up.
Steve
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Celebrating 10 years and 4000 posts on MacNN!
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Administrator
Join Date: Jun 2000
Location: California
Status:
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What is the size of your built-in drive? The one you are backing up from. And is it partitioned?
Internal (? GB)
-> to ->
External 2 TB LaCie
.. 1.1TB not backed up
.. 600 GB not backed up
.. 250 GB time machine backup
If your internal is 250GB, then you should have a larger space to back up to. The backup media should be at least 50% larger than the primary space.
If your internal is 160GB, then Time Machine has probably started backing up a partition you don't want it to. Like the 600 GB partition on the LaCie. Check your Time Machine prefs, click on (Options...), and make sure the other partitions are excluded.
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Moderator
Join Date: May 2001
Location: Hilbert space
Status:
Offline
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These days, save for some rare cases, it's not really necessary to partition drives anymore. I also suspect your backup volume on your external drive is too small. As a rule of thumb, it should at least be twice as large as the total amount of data you're backing up.
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I don't suffer from insanity, I enjoy every minute of it.
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