On 8/23/18 1:37 PM, jos via cctalk wrote: they made their own http://www.glb-online.com/disk-never-used1.html I'm mostly familiar with their 80mb SMD drives

another one https://forum.classic-computing.org/forum/index.php?thread/13826-datic/ On 8/23/18 1:37 PM, jos via cctalk wrote:

On Thu, Aug 23, 2018 at 2:37 PM, jos via cctalk <cctalk at classiccmp.org> wrote: There were some versions of CP/M on the Intel MDS development system (the _original_ CP/M machine) with support for the Intel MDS 740 hard disk system, which was an Intel SBC 206 controller with a CDC 9427H Hawk 14-inch fixed/removable drive, with IBM 5440 style media. I'm not sure whether the CP/M support was provided by Digital Research, or required a third-party BIOS. Starting in 1979, IMSAI sold the CDC Hawk, with support in IMDOS II (a licensed and modified CP/M 1.33). Ohio Scientific offered hard disk systems fairly early on, using 14-inch drives. They supported them in the OS-65U operating system, I suspect that they had CP/M support for them on their systems that included a Z80 processor. The first time I personally used a hard disk with CP/M was in 1981. It was earliest model Corvus disk system that used an IMI 7710 8-inch drive (smoked-plastic enclosure), connected to an Apple II, the latter containing a Microsoft Z80 Softcard. At one point I had to do a low-level format of the drive. You had to get the formatter program from Corvus, and add a jumper to the drive backplane to enable formatting.