From owner-freebsd-hackers Wed Mar 22 02:53:18 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id CAA01288 for hackers-outgoing; Wed, 22 Mar 1995 02:53:18 -0800 Received: from campino.informatik.rwth-aachen.de (campino.Informatik.RWTH-Aachen.DE [137.226.225.2]) by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id CAA01280 for ; Wed, 22 Mar 1995 02:53:15 -0800 Received: from gilberto.physik.rwth-aachen.de by campino.informatik.rwth-aachen.de (4.1/campino-6) id AA08963; Wed, 22 Mar 95 11:52:48 +0100 Received: (from kuku@localhost) by gilberto.physik.rwth-aachen.de (8.6.8/8.6.9) id LAA08924 for freebsd-hackers@freefall.cdrom.com; Wed, 22 Mar 1995 11:58:46 +0100 Date: Wed, 22 Mar 1995 11:58:46 +0100 From: "Christoph P. Kukulies" Message-Id: <199503221058.LAA08924@gilberto.physik.rwth-aachen.de> To: freebsd-hackers@freefall.cdrom.com Subject: Re: Why IDE is bad Sender: hackers-owner@FreeBSD.org Precedence: bulk Regarding the difference in CPU utilization, could it be - I don't know the driver internals - that it's the bounce buffer technique that costs CPU while the SCSI controller uses bus master transfers all the time? Or were you comparing VLB EIDE vs. SCSI ? --Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de FreeBSD blues 2.1.0-Development FreeBSD 2.1.0-Development #0: Sun Mar 19 17:20:44 1995 root@blues:/usr/src/sys/compile/BLUESGUS i386