Date: Tue, 21 Oct 2003 20:28:10 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Dimitry Andric <dimitry@andric.com> Cc: FreeBSD-Current List <freebsd-current@freebsd.org> Subject: Re: MBR zapped when panicking? Message-ID: <11801.1066760890@critter.freebsd.dk> In-Reply-To: Your message of "Tue, 21 Oct 2003 20:17:24 %2B0200." <13041066290.20031021201724@andric.com>
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In message <13041066290.20031021201724@andric.com>, Dimitry Andric writes: >Note that all disks in this machine are Dangerously Dedicated (see >attached fdisk-ad[023].txt). I hope that's not totally unsupported, >but what I do observe is that all these DD partitions seem to start at >offset 0 instead of 1, thereby making the MBR actually part of the >partition itself. Could this be a reason for something (GEOM?) >stomping over the MBR when the box panics? Well, GEOM is no more likely to stomp on anything than your average filesystem. Less in fact because GEOM does not originate I/O request, only pass them through. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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