davis@clocs.cs.unc.edu (Mark Davis) (01/05/90)
What happens when a 15 Megabits/sec ESDI drive is connected to a 10 Megabits/sec controller? For example, what happens if I put a 760 Meg drive on a PS/2 with the IBM ESDI Fixed Disk Drive Adapater/A in it? I know a lot about such installations, because I have have installed a Micropolis 1355, but that was a 10 Mbits/sec drive. If it works at all, will there be bad effects? For example, from reading the Technical Reference I don't see any way to set the interleave on the IBM ESDI/A adapter. Will very poor performance result because the interleave is too agressive? Or will it just write to the disk at 10Mbits/sec, reducing the total space on the disk to 10/15 of rated? I assume the same question applies to 20 Mbit/sec drives on the 15 Mbit/sec controllers. Thanks - Mark (davis@cs.unc.edu or uunet!mcnc!davis)