Time Machine - Error while preparing

[SteveBUK2]

Hi all,

After upgrading Bug Sur 11.6 to Monterey, my Time Machine won't work. I have two drives and neither will allow me to backup. It starts preparing and fails after a few seconds. If I watch the progress it goes like this.

Preparing Backup
Found 92 changes
Cleaning up

Little red ! next to the drive shows "time machine could not complete the backup"
I also see the following in the console.

error 22:12:41.237603+0100 backupd Backup failed (304: BACKUP_FAILED_PREFLIGHT_STAGE_SNAPSHOT_DIFFING)
error 22:13:41.816989+0100 backupd Failed to enumerate snapshot diffs, error: Error Domain=NSPOSIXErrorDomain Code=92 "Illegal byte sequence"
error 22:13:41.818459+0100 backupd Failed to collect events for "Media" (device: /dev/disk7s1 mount: '/Volumes/Media' fsUUID: 296B6A55-A5E4-422B-8E00-0A29137DDA39 eventDBUUID: D8510061-2C30-4BF1-A94E-3E6EF77867C9), strategy: snapshotDiffing(liveVolumeMountPoint: file:///Volumes/Media/, earlierXID: 11465, laterXID: 11559, startDate: 2021-10-25 18:16:52 +0000, previousCloneCacheURL: Optional(file:///Volumes/Backup%204TB/2021-10-25-191754.previous/.296B6A55-A5E4-422B-8E00-0A29137DDA39.clonedb)) , error: Error Domain=com.apple.backupd.ErrorDomain Code=304 "(null)"
error 22:13:42.099572+0100 backupd Failed to collect events for "Rocket 2TB" (device: /dev/disk5s1 mount: '/Volumes/Rocket 2TB' fsUUID: 0435748B-99DB-4711-A53E-914ED5CF4321 eventDBUUID: 0A760ECD-B0A9-43A7-B3F1-95A9CA8DCCD8), strategy: snapshotDiffing(liveVolumeMountPoint: file:///Volumes/Rocket%202TB/, earlierXID: 8871, laterXID: 8969, startDate: 2021-10-25 18:04:37 +0000, previousCloneCacheURL: Optional(file:///Volumes/Backup%204TB/2021-10-25-191754.previous/.0435748B-99DB-4711-A53E-914ED5CF4321.clonedb)) , error: Error Domain=com.apple.backupd.ErrorDomain Code=22 "(null)"



Anyone else seen this or have any ideas?

I've just unmounted the external data drives mentioned above and the backup works. Seems to not want to backup my externals.

Am I going to need to wipe my time machine drives and lose all my history?

 

[ISKOTB]

Hi all,

After upgrading Bug Sur 11.6 to Monterey, my Time Machine won't work. I have two drives and neither will allow me to backup. It starts preparing and fails after a few seconds. If I watch the progress it goes like this.

Preparing Backup
Found 92 changes
Cleaning up

Little red ! next to the drive shows "time machine could not complete the backup"
I also see the following in the console.

error 22:12:41.237603+0100 backupd Backup failed (304: BACKUP_FAILED_PREFLIGHT_STAGE_SNAPSHOT_DIFFING)
error 22:13:41.816989+0100 backupd Failed to enumerate snapshot diffs, error: Error Domain=NSPOSIXErrorDomain Code=92 "Illegal byte sequence"
error 22:13:41.818459+0100 backupd Failed to collect events for "Media" (device: /dev/disk7s1 mount: '/Volumes/Media' fsUUID: 296B6A55-A5E4-422B-8E00-0A29137DDA39 eventDBUUID: D8510061-2C30-4BF1-A94E-3E6EF77867C9), strategy: snapshotDiffing(liveVolumeMountPoint: file:///Volumes/Media/, earlierXID: 11465, laterXID: 11559, startDate: 2021-10-25 18:16:52 +0000, previousCloneCacheURL: Optional(file:///Volumes/Backup%204TB/2021-10-25-191754.previous/.296B6A55-A5E4-422B-8E00-0A29137DDA39.clonedb)) , error: Error Domain=com.apple.backupd.ErrorDomain Code=304 "(null)"
error 22:13:42.099572+0100 backupd Failed to collect events for "Rocket 2TB" (device: /dev/disk5s1 mount: '/Volumes/Rocket 2TB' fsUUID: 0435748B-99DB-4711-A53E-914ED5CF4321 eventDBUUID: 0A760ECD-B0A9-43A7-B3F1-95A9CA8DCCD8), strategy: snapshotDiffing(liveVolumeMountPoint: file:///Volumes/Rocket%202TB/, earlierXID: 8871, laterXID: 8969, startDate: 2021-10-25 18:04:37 +0000, previousCloneCacheURL: Optional(file:///Volumes/Backup%204TB/2021-10-25-191754.previous/.0435748B-99DB-4711-A53E-914ED5CF4321.clonedb)) , error: Error Domain=com.apple.backupd.ErrorDomain Code=22 "(null)"



Anyone else seen this or have any ideas?

My TM SSD drive was working right before I updated to Monterey and then all my backups are not showing anyone!?

 

[Killerbob]

I am seeing this issue with my Mac Mini, and a MacBook. After upgrading to Monterey the Time Machine backups will not start. I formatted the Time Capsules, rebooted, etc., but to no avail...

 

[WeatherWeasel]

I had to do two things, one after it was said and done, turn off any antivirus and restart the computer and let it churn a while. It seems to be working now.

 

[Killerbob]

Which A/V were you using, and were you able to turn it on again and the back ups kept working?

 

[CTHarrryH]

My time machine seems to be working fine. The display shown is different than prior releases but???
Seems to be backing up more than before

 

[jaymc]

I had the same problem when updating on an earlier update... turned out to be an ad blocker program (1Blocker) that was set up to start at login. Check - System Preferences > Users & Groups > Login Items.

 

[SteveBUK2]

I had the same problem when updating on an earlier update... turned out to be an ad blocker program (1Blocker) that was set up to start at login. Check - System Preferences > Users & Groups > Login Items.

thanks, I use 1blocker. So maybe related. Unfortunately, I wiped the drives and restarted. Will check this if it happens again.

 

[arfung]

I’ve had a couple of Time Machine problems since updating to Monterey. For the past couple of days, time machine has shown that it has been regularly backing up (in menu bar item). But I checked today, and Time Machine had not actually written anything to the drive (network drive via SMB during that time! It might have just been making local snapshots. Then, today, Mac kicked out a message saying that it could not read the time machine sparseimage on the network drive. I started a fresh time machine backup and will monitor to see how it goes…

 

[ignatius345]

I’ve had a couple of Time Machine problems since updating to Monterey. For the past couple of days, time machine has shown that it has been regularly backing up (in menu bar item). But I checked today, and Time Machine had not actually written anything to the drive (network drive via SMB during that time! It might have just been making local snapshots. Then, today, Mac kicked out a message saying that it could not read the time machine sparseimage on the network drive. I started a fresh time machine backup and will monitor to see how it goes…

I've had this happen too. Backups start and then silently don't complete themselves. I looked today and didn't have a backup any more recent than two days ago and initiated one manually via the menu bar icon. And now it's backing up insanely slowly. Going off this, it's gonna take 11 hours to back up ~20GB of stuff. This is a portable USB drive connected directly, btw, nothing over wifi.

 

[ignatius345]

...aaaand I just watched a Time Machine backup literally disappear from the backup drive. I'd opened it to see a list of backups and there was one dated last night around 10pm. While I was watching, it simply disappeared.

 

[ignatius345]

OK, I know nobody asked for this information, but just for anyone who comes to this thread for troubleshooting info: I've had numerous Time Machine backups fail silently over the past few days, so I'm making a separate Carbon Copy Cloner backup, after which I'll wipe the Time Machine drive and start over. Pretty lame experience!