Time Machine backup fails
When the system starts to activate the standby mode, Time Machine fails to create backups on the external drive. It seems to me, that the backupd fails to copy some files and it is never the same file/directory.
System Environment:
- Western Digital 3TB drive;
- formatted a few days ago in APFS (upper/lower) Encryption
- three years old drive
- Name TM_Backup_2021
For example the backup fails for first time at 15:41:14ff
2021-06-14 15:41:14.865 I backupd[363:2d891] [com.apple.TimeMachine:General] Starting automatic backup
2021-06-14 15:41:14.898 I backupd[363:2d891] [com.apple.TimeMachine:General] Mountpoint '/Volumes/TM_Backup_2021' is still valid
…
2021-06-14 15:41:34.934 I backupd[363:2da13] [com.apple.TimeMachine:LocalSnapshotManagement] Created Time Machine local snapshot with name 'com.apple.TimeMachine.2021-06-14-154134.local' on disk '/System/Volumes/Data'
…
2021-06-14 15:41:37.048 I backupd[363:2d891] [com.apple.TimeMachine:Inheritance] Found existing volume store '/Volumes/TM_Backup_2021/2021-06-14-143841.previous/Data' for disk '/System/Volumes/Data'
2021-06-14 15:41:39.633 E backupd[363:2d891] [com.apple.TimeMachine:General] Couldn't create MailLibraryItem at path: /Volumes/com.apple.TimeMachine.localsnapshots/Backups.backupdb/mini2020/2021-06-14-154134/Data/Users/michael/Library/Mail/V8 libraryRealm 3 fullPathToLibrary (null) pathRelativeToLibrary (null) _volumeRelativePathToLibrary (null)
…
2021-06-14 16:55:10.292 E backupd[363:32ac6] [com.apple.TimeMachine:General] Failed to copy '/Volumes/com.apple.TimeMachine.localsnapshots/Backups.backupdb/mini2020/2021-06-14-165430/Data/Library/Apple'to '/Volumes/TM_Backup_2021/2021-06-14-165431.inprogress/Data/Library', error: -43, srcErr: NO
2021-06-14 16:55:10.300 I backupd[363:326e9] [com.apple.TimeMachine:CopyProgress] Failed copy from volume "Data"
2 Total Items Added (l: Zero KB p: Zero KB)
3 Total Items Propagated (shallow) (l: Zero KB p: Zero KB)
314 Total Items Propagated (recursive) (l: 14,6 MB p: 7,7 MB)
316 Total Items in Backup (l: 14,6 MB p: 7,7 MB)
3 Directories Move Skipped (l: Zero KB p: Zero KB) | 314 items propagated (l: 14,6 MB p: 7,7 MB)
2 Directories Copied (l: Zero KB p: Zero KB)
2021-06-14 16:55:10.302 E backupd[363:326e9] [com.apple.TimeMachine:General] Copy stage failed with error: Error Domain=com.apple.backupd.ErrorDomain Code=11 "(null)"
2021-06-14 16:55:10.946 I backupd[363:326e9] [com.apple.TimeMachine:General] Unmounted local snapshot: com.apple.TimeMachine.2021-06-14-165430.local at path: /Volumes/com.apple.TimeMachine.localsnapshots/Backups.backupdb/mini2020/2021-06-14-165430/Data source: Data
2021-06-14 16:55:11.587 I backupd[363:326e9] [com.apple.TimeMachine:General] Unmounted local snapshot: com.apple.TimeMachine.2021-06-14-154134.local at path: /Volumes/com.apple.TimeMachine.localsnapshots/Backups.backupdb/mini2020/2021-06-14-154134/Data source: Data
2021-06-14 16:55:12.140 I backupd[363:32849] [com.apple.TimeMachine:General] Mountpoint '/Volumes/TM_Backup_2021' is still valid
2021-06-14 16:55:12.141 I backupd[363:32849] [com.apple.TimeMachine:General] Mountpoint '/System/Volumes/Data' is still valid
2021-06-14 16:55:12.219 E backupd[363:326e9] [com.apple.TimeMachine:General] Backup failed (11: BACKUP_FAILED_COPY_STAGE)
Afterwards I have ejected the volume in the Finder and tried to activate the volume with Disk Utility again, but the process fails:
2021-06-14 19:11:25.986169+0200 0xa62 Default 0x0 148 0 distnoted: [com.apple.distnoted:diagnostic] register name: AppleAppSleepPreferencesChangedNotification object: kCFNotificationAnyObject token: 100000000 pid: 124
2021-06-14 19:11:25.990578+0200 0x712 Default 0x0 124 0 diskarbitrationd: unable to repair /dev/disk7s2 (status code 0x00000041).
2021-06-14 19:11:26.077584+0200 0x47536 Default 0x43edc 3559 0 Disk Utility: Could not mount disk: Error Domain=com.apple.DiskManagement.disenter Code=49244 "(null)" UserInfo={DissenterPID=0, Target=disk7s2, Action=Mount, DissenterStatus=49244, Dissenter=true}
Then I turned off the power supply of the external drive and turned it on again. The Mac activated the volume and I was capable to perform a backup with Time Machine again.
What is the problem with Time Machine and the external drive?
Shouldn't I use APFS?
Thx
Michael
