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Date: Mon, 19 Jan 2009 10:47:00 +0000
From: "Bryn M. Reeves" <bmr@redhat.com>
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Subject: Re: [linux-lvm] Device-mapper
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To: LVM general discussion and development <linux-lvm@redhat.com>

Mark Reardon wrote:
> Hello All,
> 
> Has anybody ever come across this type of error before, when trying to extend a logical volume?
> 
> The LV will not extend.  Any ideas?
> 
> Device-mapper: reload iocts failed: invalid argument

Post the complete output of the command (with -vvv) and any messages 
that appear in dmesg at the time of the error.

To avoid sending large files to the list, use a service like pastebin 
and post the URL here.

Regards,
Bryn.