Date   : Mon, 14 Oct 1985 08:21:00 PDT
From   : VOORHEIS.ES@XEROX.ARPA
Subject: Re: A way to read 48 tpi disks on 96 tpi drives?

We recently purchased a Compaq AT compatable and were having trouble
formating diskettes.  The unit has one 96tpi and one 48tpi drives.
After talking with the service people at the store, here is the summary:

-a 96 tpi drive can read and write* 48 tpi format.
-a 48 tpi drive can read diskettes formated to 48 tpi by a 96 tpi drive.
-use High Density media when writing with 96 tpi drives.
-use double density media when writing with 48 tpi drives.

*We were told that 96 tpi drives heads are narrower and that the write
current is different than 48 tpi drives.  Therefore, 48 tpi drives
cannot write on HD media and 96 tpi drive cannot write on 2D (double
density media).