From time to time (I did not yet figure out a systematic way to reproduce the error) I get an error message when a new Time Machine backup begins: it says that the identity of my Time Machine backup disk has changed (see also this article from the Apple website). I recently made a clean OS X Yosemite install. I also noticed that my Computer name changes automatically from the name I gave it in the first place, MyName, to MyName (2). I am not 100% sure but I think the number in brackets increase with every such error occurring. Is anyone having similar problems? If so, what is the reason, can I avoid it?
I am using a 3 TB Time Capsule (current model) to backup my HDD.
The following are the (I hope) relevant error messages from the console (I think you can see that the name of my computer has changed and the sparse bundle needed was renamed appropriately):
20.10.14 07:23:59,664 com.apple.backupd: User continued after being warned of changed destination volume identity
20.10.14 07:23:59,676 com.apple.backupd: Error (-43): Getting volume ref for volume at path /Volumes/Phil-1
20.10.14 07:23:59,678 com.apple.backupd: Backup failed because the network destination disk was ejected or disconnected unexpectedly!
20.10.14 07:23:59,685 com.apple.backupd: Backup failed with error 26: The connection to the server was interrupted.
20.10.14 07:24:50,391 com.apple.backupd: Starting manual backup
20.10.14 07:24:50,392 com.apple.backupd: Attempting to mount network destination URL: afp://Phil;AUTH=SRP@Phils%20TC._afpovertcp._tcp.local/Phil
20.10.14 07:25:13,042 com.apple.backupd: Mounted network destination at mount point: /Volumes/Phil-1 using URL: afp://Phil;AUTH=SRP@Phils%20TC._afpovertcp._tcp.local/Phil
20.10.14 07:25:27,239 com.apple.backupd: Renaming /Volumes/Phil-1/Phils MBP.sparsebundle to /Volumes/Phil-1/Phils MBP (2).sparsebundle 20.10.14 07:26:03,934 com.apple.backupd: Disk image /Volumes/Phil-1/Phils MBP (2).sparsebundle mounted at: /Volumes/Time Machine-Backups
20.10.14 07:26:05,647 com.apple.backupd: Backing up to /dev/disk4s2: /Volumes/Time Machine-Backups/Backups.backupdb
20.10.14 07:26:48,008 com.apple.backupd: Will copy (47,28 GB) from Macintosh HD
20.10.14 07:26:48,012 com.apple.backupd: Found 93019 files (49,19 GB) needing backup
20.10.14 07:26:48,021 com.apple.backupd: 61,52 GB required (including padding), 2,64 TB available