From mboxrd@z Thu Jan  1 00:00:00 1970
From: Milan Broz <mbroz@redhat.com>
Subject: Re: Mapping sectors to have errors
Date: Fri, 28 Oct 2011 21:42:22 +0200
Message-ID: <4EAB059E.3050900@redhat.com>
References: <4EAA13E4.6020709@cs.utah.edu>
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To: device-mapper development <dm-devel@redhat.com>
Cc: Yathindra <ydev@cs.utah.edu>
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On 10/28/2011 04:31 AM, Yathindra wrote:
> 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

Try
echo -e "0 100000 linear /dev/sdb 0\n100000 480081250 error"| dmsetup create bad_disk

Milan