Connection Drops with SMB Servers on macOS Sequoia 15.1

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!

Started the stress test last night around 9:30 pm, successfully finished this afternoon at 4:15pm.

The test was Handbrake converting 68 videos from 576i to 576p @ 50fps, running 4 concurrently, where the source and destination was on the Synology.

So it seems like it might be fixed in 15.2, though I did have occasional runs comparable to this finish before without dropping the SMB connection to the Synology so I'll report back if the connection fails.

I have the same issue when using XLD to convert FLAC audio to M4a. Will run fine for a while, then all the SMBs drop - but only to the NAS I'm writing to... I have a 2nd NAS which maintains its SMB connection, so it doesn't appear to be the Mac dumping the entire SMB service - just to the one I'm heavily writing to... AND, I've copied TBs of data from the same server to server without issue. For me, I ONLY get this when using XLD (latest update). Also, I'm using Sequoia 15.2.

The same here. Now running macOS 15.2 (sequoia) and a Synology RS1221 with DSM 7.2.2-72806 Update 2. At the time of writing the latest, but apparently not the greatest, versions. Connections dropping when idle bu also when I stress the connection(s) when copying large files.

Upgraded from earlier versions of macOS and of DSM but no imporovement at all. Hoping for a solution soon....

Thanks, just checked and my username is Darrell with a capital D.

Looks like my /etc/nsmb.conf only contains:

[default]
signing_required=no

Will try the options you listed to see if the solution requires a capital letter plus something else in your nsmb.conf

I have had multiple problems using SMB with Macos Sequoia 15, and 15.1 and Synology DSM 7.2.2 (but happened on other 7.x versions also). Moving a single file was ok, but if I start multiple copy operations Finder would freeze completely, and become totally unresponsive, and the copy operation would hang. I tried all manner of fixes and changes to the SMB configuration, but nothing worked or made any difference. Eventually I gave up and switched SMB off and used NFS. It has been flawless with zero errors and supports multiple concurrent operations without any issues. My only complaint is that file deletes over NFS are very slow, but I don't do that often so thats not an issue for me.

Nope, my user name already has a capital letter in it. Perhaps something to do with attaching using a different username?

Same issue with 15.2 as well. SMB drops, but network appea4rs stable. I had a persistent ping going to the NAS (Synology) waiting for SMB to drop, and when it did, not packet loss.

It is easy to solve it: Just create the file /etc/nfs.conf with the following configuration:

nfs.client.mount.options = nfc

Reboot your Mac, end you will see the special characters without issues.