From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heinz Mauelshagen Subject: Re: [PATCH 000 of 5] md: Introduction Date: Sat, 21 Jan 2006 01:01:42 +0100 Message-ID: <20060121000142.GR2801@redhat.com> References: <26A66BC731DAB741837AF6B2E29C1017D47EA0@xmb-hkg-413.apac.cisco.com> <17358.52476.290687.858954@cse.unsw.edu.au> <43D00FFA.1040401@cfl.rr.com> <17360.5011.975665.371008@cse.unsw.edu.au> <43D02033.4070008@cfl.rr.com> <17360.9233.215291.380922@cse.unsw.edu.au> <20060120183621.GA2799@redhat.com> <20060120225724.GW22163@marowsky-bree.de> Reply-To: mauelshagen@redhat.com Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <20060120225724.GW22163@marowsky-bree.de> Sender: linux-raid-owner@vger.kernel.org To: Lars Marowsky-Bree Cc: Heinz Mauelshagen , Neil Brown , Phillip Susi , Jan Engelhardt , "Lincoln Dale (ltd)" , Michael Tokarev , linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, "Steinar H. Gunderson" List-Id: linux-raid.ids On Fri, Jan 20, 2006 at 11:57:24PM +0100, Lars Marowsky-Bree wrote: > On 2006-01-20T19:36:21, Heinz Mauelshagen wr= ote: >=20 > > > Then 'dmraid' (or a similar tool) can use 'dm' interfaces for som= e > > > raid levels and 'md' interfaces for others. > > Yes, that's possible but there's recommendations to have a native t= arget > > for dm to do RAID5, so I started to implement it. >=20 > Can you answer me what the recommendations are based on? Partner requests. >=20 > I understand wanting to manage both via the same framework, but > duplicating the code is just ... wrong. >=20 > What's gained by it? > > Why not provide a dm-md wrapper which could then > load/interface to all md personalities? >=20 As we want to enrich the mapping flexibility (ie, multi-segment fine gr= ained mappings) of dm by adding targets as we go, a certain degree and transi= tional existence of duplicate code is the price to gain that flexibility. >=20 > Sincerely, > Lars Marowsky-Br=E9e >=20 > --=20 > High Availability & Clustering > SUSE Labs, Research and Development > SUSE LINUX Products GmbH - A Novell Business -- Charles Darwin > "Ignorance more frequently begets confidence than does knowledge" Warm regards, Heinz -- The LVM Guy -- =3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D- Heinz Mauelshagen Red Hat GmbH Consulting Development Engineer Am Sonnenhang 11 Cluster and Storage Development 56242 Marienrachdorf Germany Mauelshagen@RedHat.com +49 2626 141200 FAX 924446 =3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D- - To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html