Fitted an IBM (thru a removable caddy) which is partitioned into 6 equal partitions - all on FAT 16. Works fine by itself. When I insert a 2nd HDD (as secondary master or primary slave), I get loads of errors (registry probs, corrupt file probs - usually Win95 doesn't succeed in loading, and sometimes I can't even get to raw DOS Vers.7). If I remove the 2nd drive it is as if nothing is wrong. Everything works properly again. The IBM works fine as a slave on the primary or as master on the secondary - as long as its not the boot drive. Can anyone help me get to the bottom of this please?