Connection Drops with SMB Servers on macOS Sequoia 15.1

Same. Mac Sequoia 15.1 (which some claimed had fixed the problem) did not. It seems to disconnect during heavy activity for me (copy a large file, for example.) My interim fix was to go back to NFS. Solid as a rock.

Hoping Synology or Apple figure this out. I’d prefer to just be running SMB, since that seems to be the direction everyone is supposed to be going.

After updating my Mac Studio to Sequoia I've experienced numerous disconnects with my Synology DS1821+ (DSM 7.2.1-69057 update 5). It's been extremely frustrating.

I logged into my Synology this afternoon and saw there's an update to the SMB Service. My installed version is 4.15.13-0877, the update is 4.15.13-2321. There are a lot of fixes listed, though the release notes don't specifically call out Sequoia in any of them. I'm about to install it and do some stress testing - fingers crossed!

The release notes mention this is a Staged Rollout, so you might not see it yet.

eaDir is something to do with search - there mountains of discussion on how to mitigate it. I’ve never bothered with it.

in regards to the DNS entry - it works on mine - not sure where the breakdown would be. If I see something on it - I’ll post back here.

No luck for me with 15.1.1.

I updated to 15.1.1 a day or two ago. This evening I switched my connection from NFS back to SMB then started a stress test and lost connection.

Have switched back to using NFS.

Sorry to report that the SMB Service update did not help, still experiencing disconnects to my Synology.

Thanks for the suggestion!

Yesterday afternoon I figured out how to setup NFS and its permissions on the Synology, as well as how to connect from my Studio using NFS.

I then started a stress test, basically running Handbrake with 4 concurrent jobs where the files being read and files being created are on the Synology. When using SMB the connection would drop in under an hour, causing the jobs to abort. This morning the NFS connection is still there and the jobs are still running.

I do have 2 minor issues with using NFS:

For NFS permissions on the Synology I had to use my Studio's IP address instead of hostname. The IP is assigned using DHCP, so could have changed at any time. To prevent that I configured my eero router to reserve the Studio's current IP address.

Each directory now contains a directory called @eaDir, though I don't see them with I'm logged into the Synology and using File Station.

Thanks! I'll ignore the @eaDir directories as well.

I haven't changed my Time Machine setup and when it does a backup I see Connection entries like this in Synology's Log Center:

User [Darrell] from [MAC-STUDIO(192.168.48)] via [CIFS(SMB3)] accessed shared folder [Time Machine Mac Pro].

So it seems like it MAC-STUDIO should work. Oddly enough, I don't see any entries related to the NFS connections. I do see where the NFS service started up in the log's General entries.

No biggie though, at least I have a stable connection again - thanks again for the suggestion!