From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joe Thornber <thornber@redhat.com>
Subject: Re: Mapping sectors to have errors
Date: Fri, 28 Oct 2011 10:11:41 +0100
Message-ID: <20111028091140.GD4105@ubuntu>
References: <4EAA13E4.6020709@cs.utah.edu>
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To: device-mapper development <dm-devel@redhat.com>
Cc: Yathindra Naik <ydev@cs.utah.edu>
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On Thu, Oct 27, 2011 at 08:31:00PM -0600, Yathindra wrote:
> Hi,
> 
> I'm trying to create a disk and map some sectors to have errors on them.
> 
> I tried this,
> echo "0 100000 linear /dev/sdb 0 100000 480081250 error"| dmsetup
> create bad_disk
> device-mapper: reload ioctl failed: Invalid argument
> Command failed
> 
> I have put in the right arguments but not sure why it fails.

You have 2 target lines concatenated onto the same line there.