I was able to get my Vulcan 20 to work with larger drives by replacing the EPROM with a Vulcan Gold EPROM. Here are the drives I've gotten to work with it, so far: Conner CP30084 80meg 1/3 height C/H/S: 903/4/46 Conner CP3104 100meg 1/2 height C/H/S: 1547/4/33 Those were used in Compaq computers. It appears that the Gold upgrade allows more Cylinders, but still limits the heads to 4. I tried some drives in the 125 meg range with 8 and 16 heads, no go. Also a 5 head drive would not work. I'm using Partition.Manager 2.0, anyone know if there was a newer version? There is a rumor that typing "AE" will let you change the CHS parameters, but with my hardware and firmware that just re-partitions the drive with the parameters the program comes up with. The software gives an error message and quits when the drive exceeds 4 heads, so there is no chance to input parameters. -Paul > >This maybe a stupid question, but what is a the difference between a >Vulcan and a Vulcan Gold? > >Andrew Vulcan: Propritary 20 meg IDE hard drive in a power supply with card. Vulcan Gold: same thing only with a 100 or 120 meg drive. Gold because the original Vulcan came in a case painted black The later drive used a copper or "golden" colored case. -Bart "Andrew Webber" wrote > > This maybe a stupid question, but what is a the difference between a > Vulcan and a Vulcan Gold? > The Gold has a larger hard disk, 100 megs. It's also painted "gold". Most Vulcans are black, and either 20 or 40 megs. Each has a different EPROM. A Vulcan 20 only supports 20 meg drives, the 40 supports 20's or 40's, and the Gold supports 100's or smaller. The limitations are actually on the CHS parameters, not the drive size per se, so relatively few 40 meg drives will work with the Vulcan 40. It only supports 4 heads and a limited number of cylinders, such that 2 head 40 meg drives won't work because the cylinder count is out of range. The interface card seems to be the same, other than the EPROM, so changing your EPROM to the Gold allows the use of larger drives, and more importantly, a wider variety of IDE drives. Sadly, a lot of Vulcans were junked because the crappy 20 and 40 meg drives died, and compatible drives were hard to find. Oh yeah, the newer, higher capacity drives are also smaller and take less power. Those old WD drives get really hot. -Paul