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Re: [linux-lvm] one PV crashed



On Fri, Feb 01, 2002 at 11:52:08AM +0100, Turbo Fredriksson wrote:
> >>>>> "Heinz" == Heinz J Mauelshagen <mauelshagen sistina com> writes:
> 
>     Heinz> On Fri, Feb 01, 2002 at 11:01:22AM +0100, Turbo Fredriksson
>     Heinz> wrote:
>     >> I have (had) 6 PV's in my VG. The last one crashed (the whole
>     >> disk seems to have broken totaly).
>     >> 
>     >> It don't seem possible to restore the information (not without
>     >> spending $$$ to a data recovery company), so how do I get the
>     >> data stored on the OTHER disks?
> 
>     Heinz> You don't spend a single dollar :-)
> 
> I was referring to restore the lost data on the failed disk ..

Well, that's a different story :)

> 
>     Heinz> There's 2 solutions:
> 
>     Heinz> A: --
>     Heinz> Buy a replacemeent drive (say /dev/sdg1 ;-) and run
> 
>     Heinz> fdisk # to partition it the same way the broken one was
>     Heinz> pvcreate /dev/sdg1 vgcfgrestore -f /etc/lvmconf/vg1.conf -n
>     Heinz> vg1 /dev/sdg1 vgscan
> 
> I'll get a replacement from IBM (the disk is still on warranty), so I'd
> go for this...

Ok.

> 
> Since I have data on the vg, will this still let me keep this, or will
> it be destroyed when doing the pvcreate/vgcfgrestore?
> 
>     Heinz> B: --
>     Heinz> If you don't have a replacement drive at hand you can even
>     Heinz> be faster by faking one (you must have loop configured in
>     Heinz> the kernel and use LVM 1.0.2):
> 
>     Heinz> dd if=/dev/zero of=/tmp/my_sdg1.vgda bs=1k count=512
>     Heinz> losetup /dev/loop0 /tmp/my_sdg1.vgda pvcreate /dev/loop0
>     Heinz> vgcfgrestore -f /etc/lvmconf/vg1.conf -n vg1 /devloop0
>     Heinz> vgscan
> 
> I'll do this as a temporary solution, while waiting for the replacement.
> Knowing IBM, it can take a while :)

No comment.

> 
> 
> Same question here, will the content on the VG be destroyed?
> 
>     Heinz> Hope that helps :-)
> 
> It does (at least in the sense that I'll won't loose MORE data :) Thanx.

Right.

Did you try it already with loop?

> 
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-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen Sistina com                           +49 2626 141200
                                                       FAX 924446
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