From owner-freebsd-hackers Tue Oct 10 18:00:13 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id SAA14608 for hackers-outgoing; Tue, 10 Oct 1995 18:00:13 -0700 Received: from kryten.atinc.com (kryten.Atinc.COM [198.138.38.7]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id SAA14596 for ; Tue, 10 Oct 1995 18:00:08 -0700 Received: (jmb@localhost) by kryten.atinc.com (8.6.9/8.3) id UAA20257; Tue, 10 Oct 1995 20:48:41 -0400 Date: Tue, 10 Oct 1995 20:48:39 -0400 (EDT) From: "Jonathan M. Bresler" Subject: Re: VLB Disk Controllers To: Stefan Esser cc: hackers@freebsd.org In-Reply-To: <199510091531.AA00468@Sysiphos> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hackers@freebsd.org Precedence: bulk On Mon, 9 Oct 1995, Stefan Esser wrote: > Seems you got disk_latency.c meanwhile ... > (Didn't go to work on Sunday, so I couldn't reply earlier :) > } ./disklatency /dev/rsd1f > } Command overhead is 11065 usec (time_4096 = 11120, time_8192 = 11175) > } transfer speed is 7.4424e+07 bytes/sec > > What controller is that ? > > 11ms seems very long, but that is what I got on our Sparc10 servers > running SunOS 4.1.3 as well (on 4GB Barracuda II drives !) ncr83c510 to a fujitsu 1606. but remember that i have not yet created the new slice devices, even though the disk was formatted by 2.0.5 boot floppy (so the slices exist on the media) fdisk /dev/rsd1a ******* Working on device /dev/rsd1a ******* parameters extracted from in-core disklabel are: cylinders=1040 heads=64 sectors/track=32 (2048 blks/cyl) Figures below won't work with BIOS for partitions not in cyl 1 parameters to be used for BIOS calculations are: cylinders=1040 heads=64 sectors/track=32 (2048 blks/cyl) Warning: BIOS sector numbering starts with sector 1 Information from DOS bootblock is: The data for partition 0 is: The data for partition 1 is: The data for partition 2 is: The data for partition 3 is: sysid 165,(FreeBSD/NetBSD/386BSD) start 0, size 50000 (24 Meg), flag 80 beg: cyl 0/ sector 1/ head 0; end: cyl 1023/ sector 63/ head 255 > > STefan > > -- > Stefan Esser, Zentrum fuer Paralleles Rechnen Tel: +49 221 4706021 > Universitaet zu Koeln, Weyertal 80, 50931 Koeln FAX: +49 221 4705160 > ============================================================================== > http://www.zpr.uni-koeln.de/staff/esser/esser.html > Jonathan M. Bresler jmb@kryten.atinc.com | Analysis & Technology, Inc. FreeBSD Postmaster jmb@FreeBSD.Org | 2341 Jeff Davis Hwy play go. | Arlington, VA 22202 ride bike. hack FreeBSD.--ah the good life | 703-418-2800 x346