Date: Sun, 23 Nov 2003 17:31:35 +0100 From: des@des.no (Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?=) To: Stefan =?iso-8859-1?q?E=DFer?= <se@FreeBSD.org> Cc: freebsd-hackers@freebsd.org Subject: Re: "secure" file flag? Message-ID: <xzpfzgfrqqg.fsf@dwp.des.no> In-Reply-To: <20031123121501.GA1133@StefanEsser.FreeBSD.org> (Stefan =?iso-8859-1?q?E=DFer's?= message of "Sun, 23 Nov 2003 13:15:01 %2B0100") References: <20031119003133.18473.qmail@web11404.mail.yahoo.com> <200311211333.39520.wes@softweyr.com> <20031121235607.GB16700@StefanEsser.FreeBSD.org> <200311230016.31498.wes@softweyr.com> <20031123121501.GA1133@StefanEsser.FreeBSD.org>
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Stefan E=DFer <se@FreeBSD.org> writes: > What I'm suggesting is to have the obliteration implemented as an > add on to the dirty buffer flush, with the difference that the=20 > buffer contents is prepared for the next step of the erasure process, > written out, and then not declared free but again prepared for the > next overwrite pass. This next pass won't be until thirty seconds later, so it'll take about half an hour to completely obliterate a file. Furthermore, unmounting a file system less than half an hour after a file is deleted or truncated will fail, and shutting down will most likely leave the file system unclean due to repeated failures to flush the dirty buffer list. DES --=20 Dag-Erling Sm=F8rgrav - des@des.no
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