<p>I’ve been using Samba with the <code>time machine</code> setting for years to back up the couple of Macs I own. I’ve recently been running into issues with Time Machine backups erroring out with <code>"The network backup disk does not support the required capabilities"</code>. Poking around the Internet didn’t really point at an obvious culprit until I found some mumblings about this potentially begin a disk space issue.</p>

<p>macOS Time Machine is usually set up to work in the background and not overly affect anything that’s going on in the foreground while the user is working. Under normal circumstances, this is desirable behaviour. It is not desirable when you try to take one last backup of a failing SSD before it keels over completely. Which was the unfortunate situation I found myself in.</p>