From owner-freebsd-stable  Sun Jun 23  6:37:33 2002
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Date: Sun, 23 Jun 2002 06:35:46 -0700
From: Terry Lambert <tlambert2@mindspring.com>
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To: vadim@e-complex.ru
Cc: freebsd-stable@FreeBSD.ORG, freebsd-fs@FreeBSD.ORG
Subject: Re: UFS\FFS physical layout description
References: <5714634859.20020623165716@e-complex.ru>
	 <3D15BC47.45DB3CA1@mindspring.com> <17720878203.20020623184119@e-complex.ru>
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vadim@e-complex.ru wrote:
> >>   Is it availiable description of physical layout of the UFS\FFS? I
> >>   need it for trying to recover failed filesystem.
> TL> /usr/include/ufs/ffs
> yes, I know about it... I mean, something like table with name,
> arragement and description, specially for teapot like me :)
> 
> It's too long for me to explain what is ufs_daddr_t and how long, for example.
> My situation didn't take me plenty of time...
> 
> If that table is unavaliable, I will happen to do it by my hand... :(
> 
> Or may be you can to prompt how bring csum in balance with actually
> information exist in the cylinder group info?
> 
> I see csum has incorrect information and think what cg* info is
> correct...

fsck will fix this.

Or if it's not just correcting the bits, then one of the "Desing and
Implementation" books will have the information you are asking for,
as pretty pictures:

http://citeseer.nj.nec.com/mckusick84fast.html
http://www.amazon.com/exec/obidos/ASIN/0201549794/ref=pd_sr_ec_ir_b/102-7714006-3202557
http://www.amazon.com/exec/obidos/ASIN/0201546299/qid=1024839281/sr=1-3/ref=sr_1_3/102-7714006-3202557

-- Terry

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