I have a 300Mhz PII computer with a WD 6.4 Gb hard drive.
I added a 20.5 Gb IBM Deskstar as a slave.
The system does not recognize it.
Any suggestions?
The usual cause of that effect is just that you
havent partitioned and formatted the new drive.
Presumably you are running Win98 in some form on that PC.
One approach with that is to boot from the startup floppy and
partition the new drive using fdisk. Once you have done that,
you should be able to see it in My Computer in Win9x and
can format it there by right mouse clicking on the drive in there.