From mboxrd@z Thu Jan 1 00:00:00 1970 From: rich turner Subject: RE: raidtools vs mdadm Date: Wed, 08 Sep 2004 17:11:14 -0700 Sender: linux-raid-owner@vger.kernel.org Message-ID: <1094688667.3533.5.camel@rich> References: <8075D5C3061B9441944E1373776451186488CB@cinshrexc03.shermfin.com> <1093989799.3399.27.camel@rich> <16693.7624.576505.965545@cse.unsw.edu.au> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <16693.7624.576505.965545@cse.unsw.edu.au> To: Neil Brown Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Tue, 2004-08-31 at 17:54, Neil Brown wrote: > On Tuesday August 31, rich@storix.com wrote: > > > i realize that raid devices created with raidtools and raid devices > > created with mdadm can co-exist. is there an easy way to know which > > method was used to create them? > > It is impossible to know. There is no difference. if i were to read the superblock myself, would it look different for devices created with mdadm than with devices created with raidtools? i am trying to figure out a way of knowing which tool was used to create them in the event that we need to rebuild them. any difference i can count on consistently is what i am looking for. the problem is that if we recreate raid devices using mdadm and their init scripts dont start the raid devices then the devices will not be assembled, and could possibly cause the system to not boot. > > NeilBrown