Date: Tue, 10 Oct 1995 20:48:39 -0400 (EDT) From: "Jonathan M. Bresler" <jmb@kryten.Atinc.COM> To: Stefan Esser <se@zpr.uni-koeln.de> Cc: hackers@freebsd.org Subject: Re: VLB Disk Controllers Message-ID: <Pine.3.89.9510102003.G18159-0100000@kryten.atinc.com> In-Reply-To: <199510091531.AA00468@Sysiphos>
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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:
<UNUSED>
The data for partition 1 is:
<UNUSED>
The data for partition 2 is:
<UNUSED>
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 <se@ZPR.Uni-Koeln.DE>
>
Jonathan M. Bresler jmb@kryten.atinc.com | Analysis & Technology, Inc.
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