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Date:      Mon, 17 Feb 1997 18:06:05 +0200 (EET)
From:      Narvi <narvi@haldjas.folklore.ee>
To:        Luigi Rizzo <luigi@labinfo.iet.unipi.it>
Cc:        Michael Smith <msmith@atrad.adelaide.edu.au>, hackers@FreeBSD.ORG
Subject:   Re: File system/disk recovery tools ?
Message-ID:  <Pine.BSF.3.95.970217180449.19139C-100000@haldjas.folklore.ee>
In-Reply-To: <199702171214.NAA02971@labinfo.iet.unipi.it>

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On Mon, 17 Feb 1997, Luigi Rizzo wrote:

> [about fs recovery]
> 
> > dd the whole disk off onto a file and mount it on a vnode?  You might
> 
> unfortunately is 1.6GB ... I need to find a bigger unit!
> 
> > have to reconstruct the label and such, and using fsck's '-b' option
> 
> actually an annoying thing with fsck -b is that I never know what
> to use as an alternate superblock number. 32, says the manpage, is
> an alternate superblock, but what are others ? I guess they depend

Hmmm.... I may be wrong (luckily I have never had to repair so broken a
disk) but doesn't newfs output them during the fs creation phase?

	Sander

> upon the geometry of the disk... is there a "magic" number that I
> can look for ?
> 
> 	Thanks
> 	Luigi
> -----------------------------+--------------------------------------
> Luigi Rizzo                  |  Dip. di Ingegneria dell'Informazione
> email: luigi@iet.unipi.it    |  Universita' di Pisa
> tel: +39-50-568533           |  via Diotisalvi 2, 56126 PISA (Italy)
> fax: +39-50-568522           |  http://www.iet.unipi.it/~luigi/
> _____________________________|______________________________________
> 




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