From mboxrd@z Thu Jan 1 00:00:00 1970 From: wimpunk Subject: Re: how to move a raid1 drive to a new machine Date: Mon, 10 Jan 2005 09:55:08 +0100 Message-ID: <41E242EC.5060908@tisnix.be> References: <200501100343.01672.mlaks@verizon.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200501100343.01672.mlaks@verizon.net> Sender: linux-raid-owner@vger.kernel.org To: Mitchell Laks , linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi, Mitchell Laks wrote: > Hi gurus, > > A simple question. I have studied the documents > > Software raid howto > http://www.tldp.org/HOWTO/Boot+Root+Raid+LILO.html > and scoured google. > > Given a raid1 on a machine > > /dev/md0 consists of /dev/hdc and /dev/hde. > > I want to grab one of those disks and move it to a new machine and make it > available there. My experience: just put those drives in your new machine and it will run. Btw, I didn't use any /etc/raidtab configuration, it worked out of the box. > > What I have thought about: > > turn off machine. grab /dev/hde. put in new machine say at position > /dev/hdc (for grins). > > now take an identical copy of /etc/raidtab from the original machine. > install it as /etc/raidtab > modprobe raid1 > mknod /dev/md0 b 9 0 (if necessary). > raidstart /dev/md0 > > will this work? My partitions were autodetect (fd) and after loading the raid-modules it worked fine... > > questions: > 1) when do i do mkraid /dev/md0 (ie what does that do... will it zap all the > stuff in /dev/hdc => ie what was on old /dev/hde??) yep. > 2) what is the mysterious failed-disk parameter in /etc/raidtab used for - ie > will it help here preserve the data while we start up the raid. It's handy when you're moving from a normal disk to a raid-construction. > 3) lets say i want to start the raid without a partner drive, ie just with > /dev/hdc ( "drive that used to be known as /dev/hde" "my apologies to glyph > who used to be Prince"), what do i do??? It starts with a failed disk. > > Thanks, > Mitchell > > > > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html