> you could have a hardware problem (such as with the OS drive interface) that doesn’t show up with that sort of test If the hardware is faulty, that sort of t

> you could have a hardware problem (such as with the OS drive interface) that doesn’t show up with that sort of test If the hardware is faulty, that sort of thing should show up on an automated test of the drive. In a professional setting, I'd expect this sort of thing to be run unattended: plug it in, turn it on, check back later to see if anything failed. > a software-triggered problem that doesn’t go away easily This sounds like re-image the OS territory. A user sophisticated enough to unlock and modify the OS is sophisticated enough to manage their own backups.