On Mon, 18 May 2020, Rick Moen via Dng wrote:

> (I do detachable backups to external USB hard drives, and make a point of
> doing 'dmesg | tail' before mounting, to make sure it really is
> /dev/sdc1 this time.)

My detachable backups devices have unique partitions labels and I place a
specifically named file in the root of the partition. My backup scripts
check for both and give up if they can't find both. THEN I do the dmesg
thing :-)

Jim