Is this drive by chance an 'OEM' drive??
In my experience you have to be very careful
about OEM drives. Some will work and others will
not.
It is my understanding that they use special
rom chips on OEM drives to make them compatable
with a certain system which doesn't always make
them compatable with other systems.
I have an IBM drive that will NOT work in my A3k
but works fine in my PC.