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From: Emmanuel Varagnat <emmanuel.varagnat@free.fr>
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Subject: Re: [linux-lvm] Disk crash , LVM and ext2... (bis)
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Date: Wed Oct  9 13:59:22 2002
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Heinz J . Mauelshagen wrote:
> We don't support zeroing of the data in the error case so far and do return
> an io error to the application. Later we plan to as an option.
> 
> So today you get a read error if the block is not available and the data
> is not zeroed in memory. No need to (ab)use LV_BMAP.
> 
> If your application needs to distinguish those cases anyways, you would want
> to stay with 'io error returned'.

Ok it works as I expected.
The error was coming from the fact that _I_ zeroed the partition to let 
the LVM utilties think that the PV isn't here. So the data returned was 
effectively coming from the partition.
Instead I delete the partition, reboot and retest.

Thanks for taking time to answer.

-=( manu )=-