HD Install :: Unmountable HDA

I am trying to install DSL on a hard drive i found at the dump, I think it works, but i dont know what jumper switch i need to put on it, so I've tried to use every one, and when I boot DSL from the CD, and try to install it using:

sudo su
cfdisk /dev/hda

it says something like cfdisk cant find the drive,
and I also can't unmount the hard drive because it says it's using a program or something. so I try to use fuser,but I can't figure out how it works.

No question mark? Is this a question?

In any case...

If you found it at the dump, it might work, but it might not.

Unless you have something installed to the drive, it wouldn't be giving you those messages unless something was wrong with it.

Google for disk specifications. Then run:
dmesg|grep hd
which will give info about which drives that are recognised at boot.

original here.