Time Machine Fails consistently with macOS 11.1

Question

Time Machine Fails consistently with macOS 11.1

I have a 2TB Time Capsule that has worked with several macs over several years. Backups have always been done via wireless although as of a few years ago the Time Capsule is just a member of the wireless network and not a wireless access point itself.

Now with one of my Macs running macOS 11.1, Time Machine backups fail consistently.

It looks like it completes, but the Time Machine utility shows no oldest backup.

But the little Time Machine utility in the (System Tray?) shows that the backup is still running.

I end up having to reboot the Mac to clear it to try again, but the Mac crashes with what I call The Black Screen of Death (the little window in different languages).

Attached as "Console Log" is what the console shows when I filter "errors" and "backup." I have tried deleting my snapshots, I deleted the folder on the time capsule, I removed and readded the disk in the Time Capsule utility a dozen times. I have run multiple First Aid in Disk Utility. I don't know what to do next. Any help would be greatly appreciated.

Posted on Jan 7, 2021 9:36 AM

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Answer 1

Harry_JG

Level 1

4 points

Jan 8, 2021 4:14 AM in response to jd000000000000

I had the same thing with 11.1 and my Time Machine back-ups Apple Airport . Downloaded and re-installed Big Sur 11.1, deleted the data disk on my Airport and created a new data disk.

Now everythings seems to be working again.

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Answer 2

Jan 7, 2021 9:40 AM in response to jd000000000000

Below are the last few lines of the console log, in case you are squeamish about downloading the attached full log.

error 12:02:14.778124-0500 backupd Error writing exclusions cache at /Volumes/Backups of JMacBookPro/2021-01-07-120213.inprogress/.exclusions.plist : Error Domain=NSPOSIXErrorDomain Code=5 "Input/output error" UserInfo={_kCFStreamErrorCodeKey=5, _kCFStreamErrorDomainKey=1}

error 12:02:14.778235-0500 backupd Failed to write exclusions cache. Continuing anyway.

error 12:02:14.779304-0500 backupd Encountered write failure 5 Input/output error

error 12:02:14.807229-0500 backupd Failed to update checkpoint /Volumes/Backups of JMacBookPro/2021-01-07-120213.inprogress/.com.apple.timemachine.checkpoint, exception: *** -[NSConcreteFileHandle writeData:]: Input/output error

error 12:02:14.960031-0500 backupd Error writing event cache at /Volumes/Backups of JMacBookPro/2021-01-07-120213.inprogress/.AB62B92F-9E1F-392D-B990-E3E0368AF2FB.eventdb : Error Domain=NSPOSIXErrorDomain Code=5 "Input/output error" UserInfo={_kCFStreamErrorCodeKey=5, _kCFStreamErrorDomainKey=1}

error 12:04:51.307373-0500 backupd F_FULLFSYNC failed - error: 5 Input/output error

error 12:04:51.310636-0500 backupd Invalid mountpoint '/Volumes/Backups of JMacBookPro' - failed to open '/Volumes/Backups of JMacBookPro/.iotest', error: 5 Input/output error

error 12:04:51.310807-0500 backupd Failed to copy '/Volumes/com.apple.TimeMachine.localsnapshots/Backups.backupdb/JMacBookPro/2021-01-07-120213/Macintosh HD - Data/usr'to '/Volumes/Backups of JMacBookPro/2021-01-07-120213.inprogress/Macintosh HD - Data', error: -36, srcErr: NO

error 12:04:51.313740-0500 backupd Failed to set string value '2021-01-07-120451,3,0,0,2,0,0,0' for extended attribute 'com.apple.timemachine.private.directorycompletiondate' on '/Volumes/Backups of JMacBookPro/2021-01-07-120213.inprogress/Macintosh HD - Data', error: 5 Input/output error

error 12:04:51.313816-0500 backupd Failed to set checkpoint marker for directory at /Volumes/Backups of JMacBookPro/2021-01-07-120213.inprogress/Macintosh HD - Data error: Error Domain=NSPOSIXErrorDomain Code=5 "Input/output error"

error 12:04:51.514091-0500 backupd Copy stage failed with error: Error Domain=com.apple.backupd.ErrorDomain Code=11 "(null)"

error 12:04:52.963264-0500 backupd Invalid mountpoint '/Volumes/Backups of JMacBookPro' - failed to open '/Volumes/Backups of JMacBookPro/.iotest', error: 5 Input/output error

error 12:04:52.963362-0500 backupd Backup failed because the destination disk was ejected or disconnected unexpectedly!

error 12:04:53.065709-0500 backupd Backup failed (27: BACKUP_FAILED_DISK_INTERRUPTION - The connection to the backup disk was interrupted.)

error 12:04:54.329881-0500 backupd Diskmanagement failed to unmount disk '/Volumes/.timemachine/APTC._afpovertcp._tcp.local./B910BCDD-DA62-4F19-B06F-8C1266400567/Data', error: {

Action = Unmount;

Dissenter = 1;

DissenterPID = 995;

DissenterPPID = 1;

DissenterStatus = 49168;

Target = "file:///Volumes/.timemachine/APTC._afpovertcp._tcp.local./B910BCDD-DA62-4F19-B06F-8C1266400567/Data/";

}

error 12:04:54.330969-0500 backupd Failed to unmount '/Volumes/.timemachine/APTC._afpovertcp._tcp.local./B910BCDD-DA62-4F19-B06F-8C1266400567/Data', error: Error Domain=com.apple.diskmanagement Code=0 "No error" UserInfo={NSDebugDescription=No error, NSLocalizedDescription=No Error.}

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Time Machine Fails consistently with macOS 11.1

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