----- Original Message: Date: Mon, 09 Jan 2012 22:29:10 -0800 From: Josh Dersch <derschjo at mail.msu.edu> To: General Discussion: On-Topic and Off-Topic Posts ... You don't say which images and whether you're talking about a DD drive or an HD drive emulating an 8" disk. Let me say it again: very few PCs will reliably write the Cromemco 360K DD format, but 8" images written to a 1.2M HD drive (on 1.2MB disks!) are usually quite reliable. See below. Umm... if you can't read it how do you know it was formatted correctly? The 5.25" connector normally only supports DD drives/formats (which, as I said, are notoriously unreliable reading disks made on a PC) because the /READY signal needed for 8" drives is not available on that connector. To use the more reliable 1.2M HD drives (360RPM with 1.2M HD disks) (or 3.5" HD drives for that matter) connected to the 5.25" port as 8" you need to connect pin 34 to /READY (and jumper the drive to supply /RY instead of /DC). Incidentally, that also avoids the 8" drive issues that Bill and Amardeep are arguing about. So, frankly, I'm very skeptical that your 1.2M HD drive is working at all *as an 8" drive*. BTW, your 300RPM HD drive is also going to be troublesome if not completely useless. And of course you have to select the correct drive type in RDOS with one, two or three semicolons. I'd be surprised if the 1793 were the problem, especially both of them. The 4FDC had a bad reputation for that, but out of the 20+ Cromemco systems that I supported (and still have most of) only ONE ever developed problems reading disks and I never did investigate what the cause actually was. No offence, but most likely you're doing something wrong; image/disk incompatibility, wrong type selected, etc. etc. Good luck!