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To: Padraig Brady <padraig.brady@corvil.com>
cc: Rob van Nieuwkerk <robn@verdi.et.tudelft.nl>, linux-kernel@vger.kernel.org
Subject: Re: ext3 fs: no userspace writes == no disk writes ? 
In-Reply-To: Message from Padraig Brady <padraig.brady@corvil.com> 
   of "Fri, 20 Sep 2002 10:15:05 BST." <3D8AE719.5000901@corvil.com> 
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Date: Fri, 20 Sep 2002 11:23:20 +0200
From: Rob van Nieuwkerk <robn@verdi.et.tudelft.nl>
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> Rob van Nieuwkerk wrote:
> > Hi P?draig,
> > 
> > P?draig Brady wrote:
> > 
> >>Rob van Nieuwkerk wrote:
> >>
> >>>Hi Alan,
> >>>
> >>>
> >>>>On Fri, 2002-09-20 at 00:04, Andrew Morton wrote:
> >>>>
> >>>>
> >>>>>There are frequently written areas of an ext3 filesystem - the
> >>>>>journal, the superblock.  Those would wear out pretty quickly.
> >>>>
> >>>>CF is -supposed- to wear level.
> >>>
> >>>Yes I know.
> >>>
> >>>But I haven't been able to find any specs from any CF manufacturer
> >>>about this mechanism, percentage of spare sectors or number of allowed
> >>>write-cycles in general.
> >>
> >>me either.
> >>
> >>Why don't you just mount the fs ro ?
> >>
> >>P?draig
> > 
> > 
> > Ehm .., because I need to store data on it ..
> 
> Ehm, well remount,rw before you store data on it
> and remount,ro when finished?
> 
> P?draig.

Will think about it.  Wondering how much this would impact performance
(in my application).

	greetings,
	Rob van Nieuwkerk
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