There may not be any operating system files (IO.SYS, etc) installed on the
hard drives. You must do this along with setting the partition bootable.
Boot from a floppy and then at a DOS prompt, enter SYS C:. Then try
rebooting from the hard drive.
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> Mark and Judith Walter wrote:
>
> > Hope someone can help me out. I have some older hard
> > drives(in the 202-328MB range)have tried them on a number of
> > different machines and get "Invalid System Disk, Replace the disk and