From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brassow Jonathan Subject: Re: [PATCH] dm-raid: add RAID discard support Date: Tue, 23 Sep 2014 16:52:22 -0500 Message-ID: <3D595D3E-0986-4C0C-9FB3-657253CBEB42@redhat.com> References: <1411491106-23676-1-git-send-email-heinzm@redhat.com> Reply-To: device-mapper development Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1411491106-23676-1-git-send-email-heinzm@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: device-mapper development Cc: Heinz Mauelshagen List-Id: dm-devel.ids On Sep 23, 2014, at 11:51 AM, heinzm@redhat.com wrote: > From: Heinz Mauelshagen > > Support discard in all RAID levels 1,10,4,5 and 6. > > In case of RAID levels 4,5 and 6 we have to check for the capability > to zero data on discards to avoid stripe data corruption. > > If that capabilizy is missing on any disk in a RAID set, > we have to disable discards. > > > Signed-off-by: Heinz Mauelshagen Signed-off-by: Jonathan Brassow brassow