[FireBeyond]

I never found it to be overly reliable. It was reliable... for a while. Then would silently fail/stop working, or just tell you that it had stopped working and that whatever you had in it was no longer accessible.

And then I went to Acronis True Image backing up to my Synology NAS, but that became unreliable too - oftentimes when I'd go to do a restore, the client would crash trying to read the catalog.

So, like you... CCC nightly to my Synology, with a Snapshot rotation on it - snapshot the previous night's backup at 8pm, and then kick off that night's backup at 11pm.

[AlexandrB]

Yeah, you may be right. I have fond memories of it from around 2008, but those might be from the initial experience and not all the "you need to recreate your back from scratch" errors that would crop up after a while.

[tonyedgecombe]

It was unreliable over SMB. Not surprising when you look at what it was doing. It would create a virtual drive on the share, map that and backup to it. There was too much going on for that to be reliable.

[rincebrain]

Not really.

I've loopback mounted disk images over network filesystems for many years without any recurring issues outside of macOS. It's not rocket science, particularly if you have a reliable network connection.

I'm aware there's a long tail of possible issues that can come up, but most of the complaints I've seen amount to "I have a reliable connection and Time Machine is still a tire fire", which suggests that the problem exists outside of that particular set of edge cases.

(It seems to genuinely be that nobody at Apple really cares about network filesystems at this point - people in this thread talking up AFP makes me want to look at migrating _to_ using it for my mac's backups, because SMB on macOS randomly drops or hangs for no reason and Time Machine at least twice has just started stating the backup was completely unreadable, leading to me having to restore the backup filesystem from backups.

And attempting to use NFS on macOS somehow makes everything three times as buggy, like they special cased SMB shares to not be touched in some random "touch everything synchronously" calls throughout the OS but didn't do it with NFS shares, so Finder will now take seconds or minutes to do things that shouldn't involve that share, but as soon as you remove it, it stops doing so.)

[apparatur]

For me it was a key DB file inside the Photo library which Time Machine omitted from all backups and prevented me from restoring the library. Not fun.