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EDIT: SOLVED!!! Thanks to those that commented!!
I had my TimeMachine working for backup to my NAS (DS920+). That stopped working sometime last year. I read that further updates to macOS fixed that, but I upgraded to Ventura last night and it's still not able to back up to my NAS. I have TM configured to use the NAS and it's authenticated with an account that has r/w access to the TM folder but it just won't complete. I'm seeking any insight the braintrust may have.
TM with my Synology NAS worked flawlessly until I upgraded to Ventura. I tried the troubleshooting steps outlined in this Synology support article. I also tried upgrading the NAS software as well as disable + re-enabling SMB. None of these approaches fixed the problem. Has anyone else seen this issue and found a solution?
Eventually timesout trying to connect
I'm trying to do a Time Machine backup however, it keeps failing - "Time Machine couldn't back up to "192.168.0.35". Any ideas on how to resolve this? This happened previously and I basically just disabled/enabled Time Machine however after the first backup, it appears as though Time Machine can't do another back up.
I created a Shared Folder titled TimeMachine on my NAS with its own account. I connect to it using Finder on my Mac - Go -> Connect to Server -> smb://TimeMachine:*@192.168.0.35 and enter the password for my user. I can see it mounted on my desktop.
I'm not sure if this is a macos issue or synology one, but just wanted to check if anyone else had the same problem.
Prior to updating to Sequoia, I followed this tutorial on setting up my mac to backup to my nas using time machine. It worked fine, the only issue was that I'd occasionally get notifications from my nas about exceeding the number of logins, which was my mac trying to backup. I'm still not sure why I was getting the warnings, but it would work in the end.
Since upgrading to Sequoia I get the same warnings, log center is showing that my mac has accessed the shared folder that I set up for time machine, but then my mac says backup failed and "The network disk disconnected from your mac while backing up".
I followed the steps in the video again from scratch and deleted the old backups but no luck. There is more than enough free space and the nas and mac are on the same network.
Has anyone had a similar issue and been able to solve it? Thank you.
edit: Thanks to u/s_p_lee for pointing out that it seems to be a known issue and turning the firewall fixes it. Not a permanent solution, but hopefully it's an easy fix for apple to make.
FIX: It looks like it has been fixed in Sequoia 15.1.
I don’t back up to nas so I can’t fix that specific error, but one excellent troubleshooting step you can do is attempt a restore from that volume.
The requirements to restore are fewer than a complete backup.
Next step is to add an external drive and add it as a second destination. See if Time Machine can do a backup to a different clean disk. It will still continue to try to back up to the nas every other interval, but at least you will know the system itself is good and keep backups current while you suss out the cryptic error code.
Lastly, even if you can’t restore from the sparse bundle, can you select it in finder and get it to mount? That will let you know if it needs repair in Disk Utility.
I happened to have the same problem and found a lot of useless hints to solve the issue.
I can assure you 100% it has nothing to do with file permissions, NAS version, NAS filesystem, ... it is 100% an incompatibility a Monterey patch introduced depending on when the disc was initially created.
I'm using Synology DS918+ DSM 7.1-42661 Update 4 - which has served as a time machine capsule for years without problems.
Now I'm getting error 19 while still being able to access the files and folders on the NAS without problems via SMB, AFP, SSH,...
Depending on when you initially created your backup disc, it is not compatible anymore with Monterey.
If you upgraded to macOS Monterey, your existing backups are not upgraded. New backups that are created can be used only on macOS Big Sur or later.
https://support.apple.com/en-gb/guide/mac-help/mh15653/mac
Remove the backup disc from Time Machine and create a fresh new one solves the problem.
Hi,
I use Time Machine - I have Sonoma - with a Synology NAS.
Unfortunately it work unreliable. Sometimes it works for two weeks without a problem then suddenly I get the red exclamation mark. - When I start a backup manually, it takes a long time at the "Preparing backup" stage. To get it working again, I delete the Time Machine Folder on the Synology NAS and the backup target in Time Machine - Then it works again.
But I don't want to do that every month or so.
Bonjour broadcast is on for SMB only.
Any setting to change on the Synology NAS?