From: David Woodhouse <dwmw2@infradead.org>
To: Fabrizio Pollastri <pollastri@iriti.cnr.it>
Cc: linux-mtd@lists.infradead.org
Subject: Re: "add only" fs
Date: Tue, 12 Jun 2001 11:23:02 +0100 [thread overview]
Message-ID: <18752.992341382@redhat.com> (raw)
In-Reply-To: <3B25EBA0.71C2EF64@iriti.cnr.it>
pollastri@iriti.cnr.it said:
> a common problem in embedded systems is to log important data in a way
> safe against power failure and software bugs. The question is: may be
> jffs2 the right place to introduce an "add only" protection? It can be
> at partition level, in such a way that mounting that partition as "add
> only" I am protected against loss of data, because I can only create
> new files and/or append data to existing files and never delete or
> truncate a file unless the partition is remounted rw.
JFFS2 _has_ to move data around, even data which haven't changed. If you
want 100% guarantees (or as close as possible) that some parts can't
change, put them in a separate partition which you mount readonly.
--
dwmw2
prev parent reply other threads:[~2001-06-12 10:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-12 10:14 "add only" fs Fabrizio Pollastri
2001-06-12 10:23 ` David Woodhouse [this message]
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