I installed both the 13GB HDD w/o the IDE removable rack. Sounded better already with the vibrating having stopped. Looked good as I installed mandrake 7.1. Only problem was the pointer/cursur was a large white block! (BTW, 13GB dos is primary master, cdrom slave on IDE1 and the lone 13GB as 2nd IDE master for linux). So now linux boots! (except for the cursor problem). Using Lilo I then wanted to get back to DOS to all my data and DOS programs. NOPE! Wouldn't boot to DOS (win98). Trying to use fdisk from linux fdisk /mbr -- unable to open mbr fdisk /dev/hds /mbr -- gives me a bit of a help list If I can recover, and I really hope I can with your help! I'm keeping the disks separate and removable! thanks again group!