------------Original Message: Date: Sun, 01 Apr 2007 13:05:51 -0700 From: "Chuck Guzis" <cclist at sydex.com> Subject: Re: IMI disk drive on Cromemco I don't know if this applies to the 7700, but I do recall that the 5000 was somewhat finicky about being level. IIRC, if one inclines the drive so that the positioner is working against gravity, you'll get seek failures. Cheers, Chuck -----------Reply: Good point, although that applies to most of the old drives (especially those with a linear positioner); installation guides usually specifically disallowed any orientation like that. And of course any old drive with potentially slightly worn parts should always be used in the same orientation and given lots of warm-up time before writing to it. While we're taking about the 5000, the 5MB 5007 drive's index sensor often caused problems. It used a poorly mounted reflective optical sensor which could easily move; also, dust would accumulate in the index disk holes and on the reflective surface. mike