Instructions helpful for replacing 3T with 10T (HGST enterprise grade). (no carving of bumpers required)

Is there any way to "fsck" a time-capsule drive in situ? (one could do it by disconnecting it, and attaching it as a usb disk, of course, but that's a lot of trouble)

Is there any sort of testing or burn-in one can do before using the drive for data?

My mystery is why the SuperDrive keeps spitting out the disk a few seconds after insertion. It seems to spin up momentarily.

As to the other problem of the mechanism acting like a disk is loaded wile it isn't,

After about a day running this loop in a terminal window : $ while true; do drutil eject -drive internal ; done

eventually the mechanism restored itself to the normal ready-to-accept-disk state. It now spits out perfectly good dvds. I may have to attempt to clean the optics.