Qnap Time Machine “Operation couldn’t be completed. OSstatus error 89″ Hatası

Full Problem Description;

We have a backup unit QNAP TS-431 (4.2.0) which doesn’t work with Time Machine, anymore. (Systems we use: Mac OS X Snow Leopard, Yosemite, El Capitan.) Here is the error message we got:

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

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

.

How To Solve

Problem caused by metadata on NAS Problem and you should delete old backups in to solve problem”

How To Delete Old Backups;

Disable Time Machine backup from the NAS admin page
Access the NAS via SSH in Terminal i.e. ssh admin@<ip of nas>
Delete the Time Machine files with the command:
rm -r /share/MD0_DATA/.timemachine
Enable Time Machine backup again
Run a Time Machine backup from your Mac”

This shoud fix your problem.. If not, please contact with Qnap support team for advanced help!

 

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