One needs to be Master and the other Slave.
You might have to try it both ways.

In the BIOS: Sometimes CD will work when set to auto,
and sometimes when set to None. Try that both ways too.

A new cable might help as a last resort...

                       Rick Glazier

From: "Dana S. Dufield" <[log in to unmask]>
> I've been trying to install a second CD-ROM to my 1.4GHz Athlon system.  My
> existing  CD-RW is recognized as Master on the IDE2 controller but if I try
> connecting the second drive, an older 6X, as slave Windows fails to
> recognize either CD.  Both CDs are recognized during bootup by the bios.
> When I enter the bios setup both CDs are listed.  One as Master and the
> other as Slave but after completing bootup neither one shows in My Computer
> and in the System Device Manager I have an error in the Secondary IDE
> controller that says the controller is either not working or the driver is
> not installed.  I tried reinstalling the driver but I get the message that
> the best driver is already installed.  I've tried all combinations of jumper
> pin placement on the 6X but none seem to solve the problem.  I'm stumped.

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