[CentOS] OT: Fortunate clueless dd chum - lvm recovery

[Ian Murray]

----- Original Message ----
> From: Chan Chung Hang Christopher <christopher.chan at bradbury.edu.hk>
> To: CentOS mailing list <centos at centos.org>
> Sent: Friday, 14 August, 2009 3:31:32
> Subject: [CentOS] OT: Fortunate clueless dd chum - lvm recovery
> 
> Looks like the chum did not have to lose any data.
> 
> Wiping out the MBR and the next 63 blocks apparently only wiped out grub 
> stage1, partition table, and  part of the lvm config data.
> 
> 
> I get to try to do a lvm 'recovery' at his expense now but this is my 
> first time...has anybody ever tried restoring lvm config data back to 
> the md/pv device?
> 
> 
> Cheers,
> 
> Christopher
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First of all, I would dd a copy of the whole drive off to another drive, so you can have a few goes at this.

How do you know only those bits where lost?