My Time Machine couldn't complete the backup to "NetworkBackupDrive"

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Level 1

59 points

My Time Machine couldn't complete the backup to "NetworkBackupDrive"

Hi all,

This might be a new spin on the TM problem. I have a shared backup drive hanging off a Mac Mini to which everyone backs up to their volume. Has worked for years swapping offsite drives. Since Sequoia, the TM sessions connect, calculate differences, start to back up, but never finish with the title text.

Remove the network drives from the client machines and TM now does not recognize the backup drives as valid TM volumes. TM wants to reinitiate the backup volume.

If you remove the drive and direct connect the backup disk to a client, the drive is not recognized as a TM volume. This I knew about as an existing condition.

I've seen all the posts, ran the Terminal window TM log files. This is clearly an Apple Bug even in OSX 15.1.

Thoughts?

Thanks...

[Re-Titled by Moderator]

MacBook Pro 14″, macOS 15.1

Posted on Nov 17, 2024 11:35 PM

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Answer 1

John Mollick Author

Level 1

59 points

Nov 22, 2024 11:42 PM in response to John Mollick

Since the Admin removed the title... Time Machine couldn't complete the backup to "Time Machine"

Time Machine did not finish backing up because some files were unavailable.

Backups will resume when your Mac is unlocked.

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Answer 2

John Mollick Author

Level 1

59 points

Nov 23, 2024 12:04 AM in response to John Mollick

Run term: log show --info --style compact --predicate '(subsystem == "com.apple.TimeMachine") && (eventMessage like[cd] "Failed * acquire device lock assertion*")' --last 24h

Gives you:

Timestamp Ty Process[PID:TID]

2024-11-22 23:25:38.012 E backupd[307:648fb] [com.apple.TimeMachine:FileProtection] Failed to acquire device lock assertion for '/Volumes/com.apple.TimeMachine.localsnapshots/Backups.backupdb/John's MBP/2024-11-22-195445/Data/Users/johnmollick/Library/Containers/net.whatsapp.WhatsApp/Data/Library/rc1.dat' (assertion state: <dropped>), error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"

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