You need the Kaypro 10 CP/M 2.2G Reload Disk Set (14 disks), which you can get from Don Maslin, keeper of the CP/M disk archives (donm(a)cts.com), for $3/first disk and $1/additional. The man's a saint. The 10 will work with up to 8 heads and, I believe, 306 cylinders. A Kaypro 10 manual would be helpful too, I got mine from my local Kaypro users group (yes, they still exist, all four guys of them). Some other stuff is available from The Computer Journal (http://www.psyber.com/~tcj/kaypro.html) Kai -----Original Message----- From: Phil Clayton [mailto:handyman@sprintmail.com] Sent: Wednesday, October 07, 1998 9:12 AM To: Discussion re-collecting of classic computers Subject: Formatting a Kaypro 10 Hard Drive Just purchased a kaypro 10 Computer. The Hard Drive is Dead.. As I understand it has an MFM type drive.. I have several old drives (ST 225) from old XT's that I could replace the bad one with.. (If possible).. My knowledge is limited on CP/M.. Even more limited with on CP/M on Hard Drives.. Being a computer tech I formatted hundreds of old MFM type drives on XT's but this thing is very different.. I don't know where to start on this project. Can anyone help? Thanks.. Phil....