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From: jacobs@chocolate.it.udel.edu (michael jacobs)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Formatting 1.2 Meg disks to 360K question
Keywords: floppy formatting
Message-ID: <7715@nigel.udel.EDU>
Date: 9 Jan 90 00:12:47 GMT
References: <3226@ucrmath.UCR.EDU>
Sender: usenet@udel.EDU
Reply-To: jacobs@freezer.it.udel.edu (michael jacobs)
Organization: Yoyodyne Propulsion Systems
Lines: 23

In article <3226@ucrmath.UCR.EDU> lulu@ucrmath.UUCP (david lu) writes:
=>I just tried to format some 1.2 Meg, high density disks in my
=>360K drive (as 360K), and I got the following error message:
=>
=>	Invalid media or Track 0 bad - disk unusable
=>
=>Now, I know that I can't format 360K disks to 1.2 Meg in a
=>1.2 Meg drive, but why can't I format 1.2 Meg disks to 360K
=>in a 360K drive?  I thought that "blank" disks are just that
=>-- blank.  They can be reformatted as long as the density is
=>"thick" enought, right?

Having just had this problem, I asked around and it seems that High Density
disks and Double Density disks (used for 360k) do have physical differences.
On the High Density disks, there are only certain places for the sectors
while the DD's are more flexible since there's less stuff to squeze 
together.



Mike J             |  
The Grey Sysop...  |  Phone...RING!...yep yep yep yep yep!
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