TimeMachine Big Sur to Synology NAS

After upgrade or new install of Big Sur, TM backup stoped working to Synology NAS using AFP or SMB3 protocol. TM to external USB works fire and other 4 mac's with Catalina can create TM backups to the same NAS without a problem.

MacBook Pro 13″, macOS 11.0

Posted on Nov 15, 2020 7:58 AM

Top-ranking reply

andre_1th

Level 1

4 points

Posted on Jan 8, 2021 1:10 AM

i was able to solve the problem after update Cisco AMP. With Big Sur and Cisco AMP Version 1.14.0 the TM backup doesn't work. After upgrading to Cisco AMP Version 1.14.1 every works fine.

another MBP with Catalina has no Problem with TM and Cisco AMP Version 1.14.0. The Backup is terminated on the same Synology.

Thanks everyone for solve the problem

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81 replies

Dec 12, 2020 12:43 PM in response to alkocelj

For those waiting for a Sophos fix to Big Sur, looks like it will be awhile...

Known issues between Sophos Home and macOS 11 Big Sur - Updated December 2nd, 2020

Time Machine backups to NETWORK locations are currently failing when Sophos Home is installed on Big Sur macOS 11 - Users will see a message reading "Time Machine couldn't complete the backup - The disk is already in use" This issue is currently under investigation by our development team. As a workaround, run the backup in Safe mode. We expect this issue to be resolved by March of 2021.

Separately, re: the AFP & SMB protocols. A couple of times my Time Machine bundle got corrupted. I've found out the hard way that SMB is much more stable than AFP. While AFP may still work on earlier MAC OS, do yourself a favor and switch to SMB.

Nov 25, 2020 12:09 PM in response to BrushHillMiller

BrushHillMiller: The "senior" support rep claimed to be in contact with the developers. So, you're saying turn off AFP and use SMB only? I'll have to try that.

Nov 26, 2020 1:58 PM in response to BrushHillMiller

It's backing up now - on the second try after removing Sophos Home. Success!

Nov 27, 2020 12:46 PM in response to stewart102

Are you running Sophos or any other anti-virus software? If so, remove it!

Nov 29, 2020 3:49 AM in response to alkocelj

Sadly, this is becoming the norm with all major macOS upgrades. Sticking on Catalina until Apple & Synology sort this out :(

Dec 27, 2020 4:52 PM in response to Flitter2009

... but still doesn't let the first backup complete.

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TimeMachine Big Sur to Synology NAS