jp@lanl-a.UUCP (07/08/83)
We are having a problem using Siemens FDD-100-8 series disk drives with the Heath h-100 computer. The problem revolves around the track-to- track step times. It seems the system comes set up for 3ms step times but the Siemens (and Shugart 801's) are slower than this. The information we have received from Heath has been insufficient to solve the problem. The symptoms are: Select errors on boot. Sometimes we can read directories and close-in files. Other times we can't. The drives have been checked on another system that used a WD1791 controller and seem to be OK. Has anyone had any experience with this problem that might be helpful to us?? The Siemens drives would be a real bargain if the frustration could be eliminated. Thanks, Jim Potter and Ray Martin (lanl-a!jp@lanl)
ciaraldi@Rochester.ARPA (07/14/83)
From: Mike Ciaraldi <ciaraldi@Rochester.ARPA> I am using a Shugart 851 and a CDC drive, both 8-inch and double-sided, on a Z-100. They work OK, under both CP/M-85 and ZDOS. However, occasionally they don't; I will get a seek error, especially on FORMAT. Usually rebooting fixes this up. This problem is only on the Shugart, not the CDC. I tried changing the step rates under CP/M and ZDOS using the info in the Zenith manuals. This fixed up the CP/M-85, but not the ZDOS. This caused me to find out about ANOTHER problem. The MAP command on ZDOS 1.1 will not let you declare a drive imaginary, so it can share a physical disk with another drive. I called the Zenith hotline and they mailed me a new version. This works, except now there is no way to make a drive un-imaginary. There is no switch for it, and MAP/Z, which is supposed to reset the drive configuration, does not affect imaginary drives. I called Zenith back and they said it is supposed to work this way. Mike Ciaraldi University of Rochester