I used tiny core Linux about 10 years ago in a high security environment for a data wipe verification step. Worked great and it booted to an immutable ramdisk f

I used tiny core Linux about 10 years ago in a high security environment for a data wipe verification step. Worked great and it booted to an immutable ramdisk from a USB 2 stick in seconds. It was also a breeze to setup with drivers.