Invalid system disk

[Steve Liles]

A friend of mine had a problem trying to boot from his hard drive.  I
thought it might be a CMOS issue so I played around with his CMOS
settings...it still didn't think his C drive was bootable...so I tried
the disk in one of my linux systems.  No difference.  However, now I
can't boot up from my linux box..during the boot process I'm told that I
have an "invalid system disk" and it can't boot.   Am I stupid or what?
Any ideas?

Steve