Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!killer!ames!pasteur!ucbvax!RADC-LONEX.ARPA!koziarzw
From: koziarzw@RADC-LONEX.ARPA
Newsgroups: comp.sys.zenith.z100
Subject: (none)
Message-ID: <8807101250.AA08655@radc-lonex.arpa>
Date: 10 Jul 88 12:50:12 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 22

Mail to:	info-hz100@radc-tops20.arpa	Date: Sun Jul 10 08:50:08 1988
From: koziarzw@radc-lonex.arpa
Sender: koziarzw@radc-lonex.arpa
Subject:	5.25 High Density Safety
cc:		none
Message:

Curiosity finally got the better of me, I decided to check out the affect
of mixing 360K and 1.2M 5.25 disks in each others' drive.  Guess what -- 
THEY SURVIVE WRITE OPERATIONS UNHARMED!!!!  Each will return a 'SEEK ERROR'
but data will not be destroyed.  Note that I did not perform an exhaustive
test; but my preliminary finding should put Gern a little more at ease. 
I do agree with Gern that media of different storage capacity should be of
different physical size.  But, 1.2M 5.25 drives can be found at attractive
prices, we know they work, and I have posted the pinouts for the adaptor
cable as well as the strapping/jumper settings for the Mitsubishi HD floppy
drive.  Until the 3.5 drive mysteries are resolved and the price falls, I
will continue with 5.25 HD.

NOTE:  BE SURE OF WHICH DISK YOU ARE FORMATTING, IF USING MIXED 5.25 DRIVES!!!
       FORMATTING CAN AND WILL DESTROY DATA; IF 'DIR' RETURNS A 'SEEK ERROR'
       DO NOT ASSUME THE DISK IS UNFORMATTED; IT MAY BE THE OTHER CAPACITY!!!