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Date:      Mon, 23 Mar 2009 17:45:36 +0200
From:      Jaakko Heinonen <jh@saunalahti.fi>
To:        Sam Leffler <sam@FreeBSD.org>
Cc:        svn-src-stable@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, svn-src-stable-7@freebsd.org
Subject:   Re: svn commit: r190006 - in stable/7/usr.sbin: . makefs
Message-ID:  <20090323154536.GA2853@a91-153-125-115.elisa-laajakaista.fi>
In-Reply-To: <200903190028.n2J0SsTa042656@svn.freebsd.org>
References:  <200903190028.n2J0SsTa042656@svn.freebsd.org>

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On 2009-03-19, Sam Leffler wrote:
> Log:
>   MFC makefs: a tool for creating a file system image from a directory tree

FYI, images created with sector size (-S option) other than 512 don't
work on FreeBSD. (PR 131341)

Sector size affects to the value of the fs_fsbtodb super block field.
Looks like FreeBSD ffs requires that it's always calculated with
DEV_BSIZE (512). newfs(8) sets the sector size to DEV_BSIZE before
calculating fs_fsbtodb (however the code is marked with XXX).

Here is a workaround to recalculate fs_fsbtodb at mount time if it's not
based on DEV_BSIZE:

http://www.saunalahti.fi/~jh3/patches/ffs-fs_fsbtodb.diff

-- 
Jaakko



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