Date: Mon, 20 Feb 1995 18:22:32 -0800 (PST) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: phk@ref.tfs.com (Poul-Henning Kamp) Cc: current@FreeBSD.org Subject: Re: newfs: sectors per cylinder (4096) disagrees with disk label (36) Message-ID: <199502210222.SAA20630@gndrsh.aac.dev.com> In-Reply-To: <199502210154.RAA20970@ref.tfs.com> from "Poul-Henning Kamp" at Feb 20, 95 05:54:14 pm
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>
> > This is caused by phk's changes to the behavior of newfs, it now
> > uses 1 head/cylinder, 4096 sectors/track by default. This was an
> > attempt to increase performace. I have found that it does nothing
> > for any disks I use and just leads to problems while newfsing several
> > of them.
> How did you measure this ?
Iozone using auto and 128 8192 and dd to/from /dev/{null,zero}.
Note that the newfs code already defeats the rotational delay stuff
by -n 1 -d 0 defaults.
--
Rod Grimes rgrimes@gndrsh.aac.dev.com
Accurate Automation Company Custom computers for FreeBSD
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