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From: coleman@uxe.cso.uiuc.edu
Newsgroups: comp.sys.ibm.pc
Subject: Re: Low Density Disks in High Densi
Message-ID: <45900267@uxe.cso.uiuc.edu>
Date: 24 Aug 89 15:47:00 GMT
References: <291@bilver.UUCP>
Lines: 20
Nf-ID: #R:bilver.UUCP:291:uxe.cso.uiuc.edu:45900267:000:1022
Nf-From: uxe.cso.uiuc.edu!coleman    Aug 24 10:47:00 1989


/* Written  9:13 am  Aug 23, 1989 by bill@bilver.UUCP in uxe.cso.uiuc.edu:comp.sys.ibm.pc */
/* ---------- "Re: Low Density Disks in High Densi" ---------- */
>>This raises yet another question: I have a 1.2M 5-1/4" drive in my AT clone.
>>It is able to read/write low density 360K diskettes (using the 360K format)
>>with no problems, and I swap 360K diskettes with my XT clone all the time
>>with no problems. How does the 1.2M drive know to change its write current
>>in order to successfully write a 360K floppy? 

>That's simple.  Part of the formatting routine.  You format HD and it goes to
>the higher current.  DD and it uses the lower.   If the disks had been made
>different for hd/dd the problems might not exist. 
/* End of text from uxe.cso.uiuc.edu:comp.sys.ibm.pc */

That doesn't explain why I am able to successfully read/write 360K diskettes
FORMATTED WITH A 360K DRIVE in my 1.2M drive! How does the 1.2M drive know not
to use high write current when writing data to a 360K disk?

Scott
kubla@uiuc.edu