From owner-freebsd-fs@FreeBSD.ORG  Fri Jun 23 17:13:09 2006
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	Fri, 23 Jun 2006 10:13:07 PDT
Date: Fri, 23 Jun 2006 10:13:07 -0700 (PDT)
From: "R. B. Riddick" <arne_woerner@yahoo.com>
To: freebsd-fs@FreeBSD.ORG
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Subject: Re: Journaling UFS with gjournal.
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--- Oliver Fromme <olli@lurza.secnetix.de> wrote:
> R. B. Riddick <arne_woerner@yahoo.com> wrote:
>  > Depends:
>  > If your existing file system needs its last sector,
>  > then it wont work. If it does not need it, then it
>  > might work (although fsck does not check for a
>  > raw-device shrinkage - I think)...
> 
> It has no way to check it.
>
Hmm... Maybe it is not so interesting, but I wish fsck could say, if the
partition in question is as big as it was when newfs built the file system...

> file, and fsck(8) has no way to notice that, of course.
>
fsck could not even read the last sector of the former file system, because
gjournal took it away... Or doesn't it?

> If that sector happens to contain UFS meta data, fsck(8)
> might detect the corruption and try to correct it, which
> will destroy the gjournal meta data.
>
I think write access to that sector is not possible.
Furthermore the device that is handed to fsck does not contain that meta data
sector... At least I hope, that it is like that with my geom_mirror and
geom_stripe discs... ;-)

-Arne


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