SuperDuper scheduled backup is taking down my whole system...

[Marco_Polo]

Originally Posted by dnanian

There is a timeout, it's just quite long... but you had said your *system* locked up, not just SD... and that you could mount it 'by hand', which is weird if it was spun down and the case never spun it up. Very strange.

The whole OS didn't immediately lock up.

SD locked up, the Finder locked up (and came back in the same state if killed and relaunched) and doing anything in the GUI slowed to a crawl. Other apps that were running at the same time and those apps that I launched from the Dock or from DragThing would work, but they'd be very slow and prone to pinwheeling for a long time.

I tracked it down because after many attempts to reproduce the problem under varying conditions it finally started happening when I was not running SuperDuper. That's why I called it a "statistical fluke." Eventually, the odds played out.