Wtd: ESDI 3.5" hd + hd ?'s

From: PG Manney <manney_at_nwohio.com>
Date: Tue Jan 6 16:15:51 1998

> > MFM (early 80's?)
>
> Very early 80's, I think, for the ST-506.
>
> > RLL (late 80's?)
>
> I tend to think of this as a minor variation of MFM, myself :-)

Not quite. The interface is the same (ST-506/412), but the encoding is
different.

RLL-encoded ST-506/412 drives were finicky, especially as regards
temperature -- you shouldn't LLF them cold, for example.

Actually, some (if not all) IDE's use variations of RLL encoding.
Received on Tue Jan 06 1998 - 16:15:51 GMT