mikef@portia.Stanford.EDU (Michael Fallavollita) (08/10/89)
Has anyone out there successfully installed a second hard disk in a real
IBM AT with the original controller? We have a 512K motherboard and the
original controller. The system bought with a 20MB full-size hard disk
(type 2) installed. I want to add a Seagate ST225 as a second hard disk.
This would seem easy enough but nothing works.
First I tried the usual stuff. I removed the terminator on the ST225, connected
the appropriate cables, ran setup and configured the second hard disk as a type
2 drive. All I got were hard disk 1 failures.
Then I remembered to change the jumper on the back of the ST225. A little
better, the drive light was acting a bit better, but still nothing.
At this point I thought I should try just the ST225 so I disconnected the
original disk, a Computer Memories Inc., put the terminator back in the Seagate
and reset the jumper, and reran Setup. Then I got hard disk 0 failures.
The reasonable thing to think is that maybe the drive is bad, so I went home
and got my own ST225 from one of my machines and tried to connect it right
up. I got the exact same failures. One funny thing, when the disk test are
done at startup, the controller light flashes but the ST225 light does not.
That tells me that the drive select is not right but I took the drive right
out of my working PC so why aren't the controller and disk talking to each
other?
I'm sure I'm missing something. Is there something weird about the controller
shipped with AT's, or maybe the BIOS. The BIOS allows 15 drive types. I
have a list from my Phoenix BIOS and I assume the low drive types are the
same.
Any pointers would be greatly appreciated.
Thanks in advance,
Mike
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