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From: jnp@calmasd.GE.COM (John Pantone)
Newsgroups: comp.sys.tandy
Subject: Double-sided drives for Mod 4
Message-ID: <2364@calmasd.GE.COM>
Date: Wed, 2-Sep-87 12:56:52 EDT
Article-I.D.: calmasd.2364
Posted: Wed Sep  2 12:56:52 1987
Date-Received: Sat, 5-Sep-87 10:38:23 EDT
Distribution: na
Organization: G.E.- Calma R&D, San Diego, CA
Lines: 21
Keywords: format, DSDD
Summary: HELP!


I recently got hold of two double sided double density 5" floppy drives
which had been part of a XEROX CP/M machine.  They work well and I have
installed one as drive :1 on my Mod 4.  After changing the step rate on
drive :1 and sysgen-ing it works great EXCEPT it will only function as a
single sided drive.  If I answer 2 to the SIDES? prompt from the format
utility, it appears to fail to verify every track - it lockes them out
(00* 01* ...)

If, however, I use SuperCROSS/XT to format the disk as one of the double
sided double density CP/M formats - it works just fine.

It isn't - apparently - the hardware.

WHAT MUST I DO??  ANY GUESSES ?

e-mail please.
-- 
These opinions are solely mine and in no way reflect those of my employer.  
John M. Pantone @ GE/Calma R&D, Data Management Group, San Diego
...{ucbvax|decvax}!sdcsvax!calmasd!jnp          jnp@calmasd.GE.COM