Time Machine Can’t Access the Backup Disk “TMbackup” Problem & How To Solve

Time Machine can’t access the backup disk “TMbackup”

(Operation couldn’t be completed. OSstatus error 89.)

qnap time machine TMbackup

How To Solve;

1 – Disable Time Machine backup from the NAS admin page
2 – Access the NAS via SSH in Terminal i.e. ssh admin@
3 – Delete the Time Machine files with the command:
rm -r /share/MD0_DATA/.timemachine

4 – Enable Time Machine backup again
5 – Run a Time Machine backup from your Mac”

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