From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Bryn M. Reeves" Subject: Re: Simulating faulty disk Date: Thu, 20 Oct 2011 18:40:26 +0100 Message-ID: <4EA05D0A.7030909@redhat.com> References: <4E9F9321.8090704@cs.utah.edu> <4E9FE97E.4030209@redhat.com> <4EA04201.1050702@cs.utah.edu> <4EA044A9.6070406@redhat.com> <4EA05072.10107@cs.utah.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mx1.redhat.com ([209.132.183.28]:10056 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751063Ab1JTRke (ORCPT ); Thu, 20 Oct 2011 13:40:34 -0400 In-Reply-To: <4EA05072.10107@cs.utah.edu> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Yathindra Cc: linux-scsi@vger.kernel.org On 10/20/2011 05:46 PM, Yathindra wrote: > >dmsetup create d0 --table="0 `blockdev --getsize /dev/sdb` delay > /dev/sdb 0 500" > device-mapper: reload ioctl failed: Invalid argument > Command failed > > In /var/log/messages I see this, > device-mapper: ioctl: error adding target to table I don't see this here: # dmsetup create d0 --table="0 `blockdev --getsize /dev/sdb` delay /dev/sdb 0 500" # dmsetup info -c d0 Name Maj Min Stat Open Targ Event UUID d0 253 3 L--w 1 1 0 # dmsetup create f0 --table="0 `blockdev --getsize /dev/mapper/d0` flakey /dev/mapper/d0 0 9 1" # dmsetup info -c f0 Name Maj Min Stat Open Targ Event UUID f0 253 4 L--w 0 1 0 This is using the f15 2.6.40.3 (aka kernel-3.0) with a locally compiled dm-delay since it's not enabled in the Fedora kernels. Might want to move this thread over to dm-devel if you're having trouble with it. Regards, Bryn.