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MacOS Sierra Time Machine - Preparing backup... forever to Synology

I am using Synology NAS to backup my Mac using Time Machine. After upgrade to MacOS Sierra (10.12.1) Time Machine backup sort of backed up my Mac. By sort of I mean it was showing Preparing backup...  forever but if I entered Time Machine backup all backups even new ones were there.

To resolve the issue with "Preparing backup...":

Time Machine disk selection
  1. I removed backup disk in Time Machine preferences
  2. Removed all Synology Diskstation passwords from KeyChain Access (not only Time Machine ones) 
  3. Deselected Time Machine shared folder from Synology file services menu
  4. Disabled Mac file service (AFP) from Synology Control panel
  5. Dismounted all Synology mounted drives
  6. Enabled SMB 3.0 in Synology File services (Control panel)
  7. Enabled back Mac file service in Synology
  8. Selected Time Machine shared folder under Mac file services in Synology
  9. Opened Time Machine settings and Selected Time Machine disk from the list
  10. Selected Encrypt backup
  11. Entered username and password for Time Machine backup
  12. Entered password for encrypted backup
  13. Selected to Delete old backup (move .sparseBundle to other disk if you want to preserve it)
  14. Started backup

I was checking if Time Machine mounts the folder in Finder and everything was OK. Backup finished "first" backup in around 5 hrs. Now it's working without any problems.


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Comments

  1. KevMNovember 12, 2016 at 9:57 PM

    I followed this exactly and it sadly didn't work for me. My error is:

    The network backup disk could not be accessed because there was a problem with the network username or password. You may need to re-select the backup disk and enter the correct username and password.

    Username and password are confirmed working via Finder. Any suggestions are appreciated.

    ReplyDelete
    Replies
    1. DuĊĦan SoraviaNovember 12, 2016 at 10:16 PM

      It is crucial that you don't open/mount anything from Diskstation in Finder after you delete credentials in keychain. Time Machine should be the first instance asking you to enter username/password for Diskstation.

      Delete

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