On Thu, Jun 01, 2006 at 12:39:39AM +0200, chris wrote:
> Thanks Heinz,
>
> this looks like what i was serching for. still, it didn't work out.
>
> the first call of this command issued (apart from multiple "couln't find
> device..")
> "device-mapper ioctl cmd 9 failed: Das Argument ist ungültig"
> (i hate german error messages, who invented this? it says "illegal
> argument")
>
> but also "1 logic voliume(s) .. now active".
Well, looks like your Logical Volume got activated.
Of course with a hole punched out (the missing drive).
Try to mount it manually.
Heinz
>
> lvscan says "Volume group ... not found"
> mount fails.
>
> what should i try next?
>
> regards, Chris
>
> PS: about the stripes, I don't think I have any.
>
> On Wed, 31 May 2006 23:31:54 +0200, Heinz Mauelshagen
> <mauelshagen@redhat.com> wrote:
>
> >
> >vgchange -ay --partial
> >
> >On Wed, May 31, 2006 at 01:45:46PM +0100, Graham Wood wrote:
> >>On Wed, May 31, 2006 at 02:34:04PM +0200, chris wrote:
> >>> I have create a volume group with 4 250GByte harddisks with an ext3
> >>file
> >>> system on the 1TB result.
> >>Stripe or concat?
> >>
> >>> now the third harddisk failed and the volume group is "dead" -
> >>obviously.
> >>The way you created the volume had no redundancy - therefore 25% of
> >>your data is gone, as
> >>well as the volume's "completeness".
> >>
> >>If you did a concat, then you (with playing) may be able to get some
> >>data back from the
> >>first 500GB of the volume - but I wouldn't want to rely on anything
> >>that came back from it.
> >>I'd suggest getting hold of 2 identical blank disks, and doing a binary
> >>(dd) copy of disks 1
> >>and 2 to them - and then work on them. You might be able to use
> >>vgcfg{backup,restore} to
> >>tell the system that this volume is actually only on 2 disks....
> >>However, anything that
> >>references data > 500GB into the volume is almost definitely lost -
> >>because although you've
> >>got 750G-1TB, it's almost all going to be linked back into the section
> >>that you've lost.
> >>
> >>If you did a stripe, then you can forget getting any data back off it.
> >>You've lost every
> >>4th block of whatever size you striped on. E.g. with a 64k stripe
> >>size, you'll have lost
> >>from 128k-192k, 384k-448k, etc. - and there's almost definitely going
> >>to be nothing
> >>salvagable from that.
> >>
> >>Graham
> >>
> >>_______________________________________________
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> >>linux-lvm@redhat.com
> >>https://www.redhat.com/mailman/listinfo/linux-lvm
> >>read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
> >
>
>
> _______________________________________________
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Heinz Mauelshagen Red Hat GmbH
Consulting Development Engineer Am Sonnenhang 11
Storage Development 56242 Marienrachdorf
Germany
Mauelshagen@RedHat.com PHONE +49 171 7803392
FAX +49 2626 924446
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