check out this wackiness in a removable hard drive sled inside a TASCAM MMR-8: It has a key lock, but the key lock doesn't lock the door, as you'd expect. Instead the lock is just a switch, and it communicates back with some board, which controls a solenoid to unlock the door. Now that's some paranoid over-design!
heh. The manual lists the approved hard drives for use with it.
I guess none of the letters in "SCSI" are "standard"!

also the weird one in that list is the Nikon thing with the asterisk.
It turns out it's a 2.5gb magneto-optical drive that I think was only released in japan?

https://item.rakuten.co.jp/waysas/10015260/?scid=s_kwa_pla_unpaid_211514

Anyway, this is the TASCAM MMR-8.
Sadly it's not as useful (for me) as I was hoping: it has a lot of video support, but it's not really for doing video: it's for syncing audio TO video. This is specifically an audio device, not a video device. Whoops.
fun fact: it turns out that inside it's built on a Socket 7 motherboard. From ASUS!
Also apparently the OS is stored on a Quantum Fireball IDE drive.
@foone the left half of that hard drive looks like another hard drive