Zac67: I thought with OS3.9 you don't have to worry about the 4GB+ problem. If I recall, the master/slave concept applies to SCSI. I'm trying to connect this HD to the internal IDE controller, so I probably don't need to mess with any jumpers, right?
Damiga: Yes, I'm quite sure I connected it correctly. The drive's connector had a few extra pins (4- I think), but I connected it the same way as the old one. That is, the IDE lead all the way to the top pin (same direction as the back of the Amiga). Thanks for the EIDE link. That helped clarify some things, such as the IDE/EIDE/ATA/PATA labels really don't tell you any specifics of the modes and standards that would affect if a drive is compatible with the A1200's IDE controller or not. Of course, one certain way to more easily acquire a compatible drive would be to get one from an Amiga dealer who knows what they have works. :-)
Franko: I'm using 2.5" HDs. I recently heard 3.5" can be used with the A1200, but it sounds like that much more fiddling and stuff to worry about. Yes, that's what happened with the 80GB one I tried recently- it didn't even spin up. I would also very much like to know if anyone has a list of what makes & models of larger capacity 2.5" HDs work on the A1200.
x56h34: Interesting, it sounds like the underpowered A1200 power supply could be the real issue. My 1200 has an accelerator, however it has a more powerful power supply. I thought I remembered the distributor included an A500 one. I checked and compared it to my A500's power supply, and it is even more powerful than that. I'm not sure, but it may be an A600 power supply. The 500's is model DSP-A500, output 5V 4.5A, 12V 1A, -12V .1A. The 1200's is model PSM-600, output 5V 6.5A, 12V 2A, -12V .5A. Yet this was not enough to spin up the Western Digital HD. Maybe Seagate and Hitachi are more power efficient? Or maybe WD has a specific IDE/ATA standard incompatibility (though they're supposed to be downward compatible Zac67 was saying)? What's the total voltage requirement to spin up the Seagate and Hitachi drives?
Daedalus: Considering my extra strong PSU, maybe it's not the power. I'm quite sure I hooked the HD up correctly. It had 4 pins extra (in 2 rows) on the front side (front direction of the Amiga) of the HD connector. What make and model HDs do you use on your A1200s?
Khephren: I wonder if there is a difference with A1200 motherboard power. My 1200 is dated Dec. 4, 1995.