Subject: Re: ESDI
To: Andreas Gustafsson <email@example.com>
From: John Nemeth <firstname.lastname@example.org>
Date: 06/18/1999 22:59:28
On Jun 3, 5:46pm, Andreas Gustafsson wrote:
} John Nemeth <email@example.com> wrote:
} > This is wrong. ESDI drives respond to the IDENTIFY command, and
} > possibly other "ATA" commands. ESDI is a superset of the original
} > WD1003 command set, and ATA is a superset of that.
} I thought ESDI was an electrical interface between controller and
} drive like ST506, not a controller command set like WD1003.
It's both. The WD1007 controller (and others) supported a command
set that was a superset of the WD1003 command set. Later on, ATA came
along and extended the command set even more.
} If something in an ESDI system responds to an ATA IDENTIFY command,
} it must be the controller, not the drive.
Yes, but it gets the information needed to respond to the command
from the drive somehow.
}-- End of excerpt from Andreas Gustafsson