I am assuming this is the same as a DRE 9448 or CDC 9448 (which are the same unit). It's a frontloader with one removable platter (1 data surface, 1 servo surface) and 3 fixed platters (5 data surfaces, 1 servo surface) Unless you have both the outer cover for the pack (unlike DEC RL's etc, the cover is _not_ stored inside the drive when you put the pack in) and the shipping cover for inside the drive, it's safer to ship this unit with the removeable pack in place. The manaul says there should be a catridge in place at all times, whether operating or not. Anyway, to remove the pack, take off the top cover (screws on the back), and check the heads are fully retracted. If they're not, they're probably ruined anyway!, but you might as well pull the positioner coil back by hand. Accroding to the service manual, to release the door without power, you insert a thin blade (the manual suggests an old steel ruler) in the slot under the door, roughtly in the middle, and slide it towards the right side of the drive. This with release the door catch, you then open the door (which lifts the removeable pack off the spindle) and slide the pack out. While you're inside, you'll see a metal bar with 2 pins, one sticking out each side, screwed to the top of the positioner. Remove it, engage the pin closest to the mounting hole in the hole on the positioner carriage, and put the screw back in. This locks the heads at the home position (for reference, the other pin holds the heads in the right position over a revolving disk to do the head alignment). -tony