From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yathindra Subject: Re: Simulating faulty disk Date: Thu, 20 Oct 2011 11:53:36 -0600 Message-ID: <4EA06020.9000708@cs.utah.edu> References: <4E9F9321.8090704@cs.utah.edu> <4E9FE97E.4030209@redhat.com> <4EA04201.1050702@cs.utah.edu> <4EA044A9.6070406@redhat.com> <4EA05072.10107@cs.utah.edu> <4EA05D0A.7030909@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from rio.cs.utah.edu ([155.98.64.241]:39201 "EHLO mail-svr1.cs.utah.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756141Ab1JTRxz (ORCPT ); Thu, 20 Oct 2011 13:53:55 -0400 In-Reply-To: <4EA05D0A.7030909@redhat.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: "Bryn M. Reeves" Cc: linux-scsi@vger.kernel.org, dm-devel@redhat.com Oh I see. Maybe dm-delay is not enabled in ubuntu either. Could you please tell me how I could enable it. Thanks, Yathi On 10/20/2011 11:40 AM, Bryn M. Reeves wrote: > 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.