Backup failed with error: 20

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Level 1

19 points

Backup failed with error: 20

Some days ago my Time Capsule went out by itself. After a reboot all my Macs are unable to backup. All the same errors in the log:

Jan 20 17:30:23 jim com.apple.backupd[623]: Starting standard backup

Jan 20 17:30:23 jim com.apple.backupd[623]: Network destination already mounted at: /Volumes/Disk01

Jan 20 17:30:23 jim com.apple.backupd[623]: Creating disk image /Volumes/Disk01/jim.domain 1.sparsebundle

Jan 20 17:30:25 jim com.apple.backupd[623]: Error 22 creating backup disk image

Jan 20 17:30:25 jim com.apple.backupd[623]: Failed to create disk image /Volumes/Disk01/jim.domain 1.sparsebundle, status: 22

Jan 20 17:30:35 jim com.apple.backupd[623]: Backup failed with error: 20

When I check the Time Capsule, my old backup image is called: jim.domain.sparsebundle. While Time Machine suddenly starts to create a image with a 1 in the filename (which fails), I can't seem to show Time Machine it has already a working image without the 1. I tried to point again to the Time Capsule disk, but no luck.

Since a few Macs backup over the internet it's no option just to erase all the images and start over again.

Anyone tips?

Mac mini, Mac OS X (10.6.7)

Posted on Jan 20, 2012 8:38 AM

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Answer 1

Pondini

Level 8

38,863 points

Jan 20, 2012 4:08 PM in response to Jim Nijkamp

Jim Nijkamp wrote:

. . .

When I check the Time Capsule, my old backup image is called: jim.domain.sparsebundle.

Try Repairing that one, per #A5 in Time Machine - Troubleshooting.

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Answer 2

Jim Nijkamp Author

Level 1

19 points

Jan 21, 2012 6:01 AM in response to Pondini

Thanks Pondini for the tip. I did try to repair the image:

There didn't seem to be any problems with it. I don't know why Time Machine is suddenly trying to make another image and doesn't look for the old image anymore. Any other idea's how to reanimate the old image?

Thanks!

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Answer 3

Pondini

Level 8

38,863 points

Jan 21, 2012 8:10 AM in response to Jim Nijkamp

Jim Nijkamp wrote:

. . .

I don't know why Time Machine is suddenly trying to make another image and doesn't look for the old image anymore. Any other idea's how to reanimate the old image?

If you haven't yet, try resetting the TC, per http://support.apple.com/kb/ht3728

Then do a "full reset" of Time Machine, per #A4 in Time Machine - Troubleshooting.

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Answer 4

Jim Nijkamp Author

Level 1

19 points

Jan 28, 2012 7:45 AM in response to Pondini

Did both, no improvement. Still the same errors in logfile. Any other tips?

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Answer 5

Jim Nijkamp Author

Level 1

19 points

Oct 11, 2012 5:42 AM in response to Jim Nijkamp

In the end I did the following steps:

- copy original backup images to a local disk;

- totally reset (and format internal disk) the TC to original settings;

- configure TC again;

- put back the backup images from local disk to TC.

Now it works ok again. Still no clue what was going on. Notice that sometimes the TC gives errors back to the clients for a day or so. I don't do anything and everything returns normal again after a few days. Weird...

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