From owner-aic7xxx Mon Oct 5 12:28:20 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id MAA11138 for aic7xxx-outgoing; Mon, 5 Oct 1998 12:28:20 -0700 (PDT) (envelope-from owner-aic7xxx@FreeBSD.ORG) Received: from meserv.me.umn.edu (meserv.me.umn.edu [134.84.196.1]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id MAA11117 for ; Mon, 5 Oct 1998 12:28:17 -0700 (PDT) (envelope-from kaszeta@me.umn.edu) Received: from bofh.me.umn.edu (kaszeta@bofh.me.umn.edu [134.84.18.23]) by meserv.me.umn.edu (8.9.1a/8.9.1) with ESMTP id OAA08739; Mon, 5 Oct 1998 14:27:52 -0500 (CDT) Received: (from kaszeta@localhost) by bofh.me.umn.edu (8.9.1/8.9.1) id OAA25733; Mon, 5 Oct 1998 14:27:51 -0500 From: Richard Kaszeta MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <13849.7607.119459.475917@bofh.me.umn.edu> Date: Mon, 5 Oct 1998 14:27:51 -0500 (CDT) To: Michael Kunze Cc: "aic7xxx@FreeBSD.ORG" Subject: Re: Ultra2 transfer mode? In-Reply-To: <36190ABA.C835F0B8@ivw.de> References: <36190ABA.C835F0B8@ivw.de> X-Mailer: VM 6.47 under Emacs 19.34.1 Sender: owner-aic7xxx@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Michael Kunze writes ("Ultra2 transfer mode?"): >pre 15 works for me without problems on an Asus P2B-LS. There is still a >question left i asked some mails ago. If i take a look into >/proc/scsi/aic7xxx/0, i see > >Statistics: >(scsi0:0:0:0) >Device using Wide/Async transfers. > ^ ^ ^ ^ >Device Negotiation Settings >Period Offset Bus Width >User 000 000 1 >Goal 000 000 1 >Current 000 000 1 >Total transfers 3595 (3370 read;225 written) >blks(512) rd=16267; blks(512) wr=654 > >This should be definitely synchronous, because the harddisk is an IBM >DGHS09V Ultra2-SCSI, which of course is capable of ultra2 synchronous >transfers. > >So, what is the REAL transfer mode? 80 Mbyte/s synchronous or 20 MByte/s >or >less asynchronous? I would suspect for some reason it is async, since if I look at my machine (P2B-LS with ST34573LW), I get Statistics: (scsi0:0:0:0) Device using Wide/Sync transfers at 80.0 MByte/sec, offset 15 Device Negotiation Settings Period Offset Bus Width User 010 127 1 Goal 010 127 1 Current 010 015 1 Total transfers 119835 (33099 read;86736 written) blks(512) rd=174929; blks(512) wr=305836 -- Richard W Kaszeta Graduate Student/Sysadmin bofh@me.umn.edu University of MN, ME Dept http://www.menet.umn.edu/~kaszeta To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-aic7xxx" in the body of the message