I have an IBM A31 which has two bays that can hold an battery, CD/DVD, floppy, HD. Same as that originally the Tecra 500 had.
So I have a second hard disk in one bay and in the other the DVD/CD player and boot from CD. Fastest way: can do a restore in < 10 minutes inclusive synchronising "data" and rebooting /logging in. have posted more on this in the past, as well as my mentor did (bali_survivor, the father, not the present one who is the daughter)
Sherlock