Time Machine: sparcebundle could not be accessed (error -1)

Hello!

I’ve using Time Machine with my Time Capsule for some time and out of nowhere it started giving me the following error: The backup disk image “xxx/xxx/xxx.sparcebundle”could not be accessed (error -1).

I’ve been searching weeks for a fix without success, already tried http://pondini.org/TM/Troubleshooting.html - #C17 and it didn’t help.

Also tried on my Time Capsule: unplug, reset, factory reset, erase disk, format disk, change password, and on Time Machine preferences tried to remove disk and add again…. no success, error persists.

I discovered the only way for backup to work is to I login as a test user which I created for this purpose (I’m the administrator).

Any help would be greatly appreciated. Thanks.

Here are the logs:

Backup logged in as Administrator (Backup Failed):

Starting automatic backup

Attempting to mount network destination URL: afp://xxxx%20xxxx;AUTH=SRP@Aar._afpovertcp._tcp.local/Data

Mounted network destination at mount point: /Volumes/Data using URL: afp://xxxx%20xxxx;AUTH=SRP@Aar._afpovertcp._tcp.local/Data

Failed to eject volume /Volumes/Data (FSVolumeRefNum: -166; status: -47; dissenting pid: 0)

Waiting 60 seconds and trying again.

Network destination already mounted at: /Volumes/Data

Failed to eject volume /Volumes/Data (FSVolumeRefNum: -166; status: -47; dissenting pid: 0)

Waiting 60 seconds and trying again.

Network destination already mounted at: /Volumes/Data

Failed to eject volume /Volumes/Data (FSVolumeRefNum: -166; status: -47; dissenting pid: 0)

Giving up after 3 retries.

Backup failed with error: 21

[SnapshotUtilities mountPointForVolumeRef] FSGetVolumeInfo returned: -35

Failed to eject volume (null) (FSVolumeRefNum: 0; status: -35; dissenting pid: -1)

Failed to eject Time Machine disk image: /Volumes/Data/Super’s iMac.sparsebundle

Backup logged in as a test user (Backup completed successfully):

Starting automatic backup

Attempting to mount network destination URL: afp://xxxx%20xxxx;AUTH=SRP@Aar._afpovertcp._tcp.local/Data

Mounted network destination at mount point: /Volumes/Data using URL: afp://xxxx%20xxxx;AUTH=SRP@Aar._afpovertcp._tcp.local/Data

Disk image /Volumes/Data/Super’s iMac.sparsebundle mounted at: /Volumes/Time Machine Backups 2

Backing up to: /Volumes/Time Machine Backups 2/Backups.backupdb

Using file event preflight for Mac HD

Will copy (44.4 MB) from Mac HD

Using file event preflight for Dados

Will copy (Zero KB) from Dados

Found 2280 files (44.4 MB) needing backup

1.5 GB required (including padding), 752.35 GB available

Copied 7285 files (45.2 MB) from volume Mac HD.

Copied 7303 files (45.2 MB) from volume Dados.

Using file event preflight for Mac HD

Will copy (2.6 MB) from Mac HD

Found 58 files (2.6 MB) needing backup

1.59 GB required (including padding), 752.32 GB available

Copied 1122 files (4.4 MB) from volume Mac HD.

Copied 1140 files (4.4 MB) from volume Dados.

Created new backup: 2013-10-02-121637

Starting post-backup thinning

Deleted /Volumes/Time Machine Backups 2/Backups.backupdb/Super’s iMac/2013-10-01-120751 (4.1 MB)

Deleted /Volumes/Time Machine Backups 2/Backups.backupdb/Super’s iMac/2013-10-01-110755 (8.5 MB)

Deleted /Volumes/Time Machine Backups 2/Backups.backupdb/Super’s iMac/2013-10-01-101239 (21.7 MB)

Deleted /Volumes/Time Machine Backups 2/Backups.backupdb/Super’s iMac/2013-10-01-004813 (1.3 MB)

Post-back up thinning complete: 4 expired backups removed

Backup completed successfully.

Ejected Time Machine disk image: /Volumes/Data/Super’s iMac.sparsebundle

Ejected Time Machine network volume.