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Date:      Sun, 22 Aug 1999 12:17:47 +0800
From:      Peter Wemm <peter@netplex.com.au>
To:        Doug <Doug@gorean.org>
Cc:        Poul-Henning Kamp <phk@FreeBSD.ORG>, cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject:   Re: cvs commit: src/release/sysinstall install.c label.c options.csysinstall.h 
Message-ID:  <19990822041747.71E921C99@overcee.netplex.com.au>
In-Reply-To: Your message of "Sat, 21 Aug 1999 18:12:41 MST." <37BF4E89.D3CD53C2@gorean.org> 

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Doug wrote:
> Poul-Henning Kamp wrote:
> > 
> > phk         1999/08/05 12:50:27 PDT
> > 
> >   Modified files:
> >     release/sysinstall   install.c label.c options.c sysinstall.h
> >   Log:
> >   Make the newfs parameters a global option.
> > 
> >   The default is still "-b 8192 -f 1024" but my experiments show that
> >   "-b 16384 -f 4096 -c 100" is a more sensible value for modern
> >   disksizes.

Incidently, I found that using a frag to block ration != 8 was a certain
killer for a news filesystem.  ie: 8k/1k worked beautifully, and so did 4k/
0.5k.  If I did 4k/1k or 8k/2k, the system would badly trash the file
system by corrupting the block allocation bitmaps within 2 or 3 days of
running at full load.  I was never able to track this down though as it was
only occurring on a live system that I wasn't allowed to go back to 4k:1k
for debugging once it was working.  The 4:1 ratio of 16k/4k rings alarm
bells to me..

Cheers,
-Peter



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