From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Leslie Rhorer" <lrhorer@satx.rr.com>
Subject: RE: New device for RAID array
Date: Fri, 13 May 2011 00:59:32 -0500
Message-ID: <FE.67.03125.EB8CCCD4@cdptpa-omtalb.mail.rr.com>
References: <20110513155031.4ceb0686@notabene.brown>
Reply-To: <lrhorer@satx.rr.com>
Mime-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <linux-raid-owner@vger.kernel.org>
In-Reply-To: <20110513155031.4ceb0686@notabene.brown>
Sender: linux-raid-owner@vger.kernel.org
To: 'NeilBrown' <neilb@suse.de>
Cc: linux-raid@vger.kernel.org
List-Id: linux-raid.ids

	Thanks.

> -----Original Message-----
> From: NeilBrown [mailto:neilb@suse.de]
> Sent: Friday, May 13, 2011 12:51 AM
> To: lrhorer@satx.rr.com
> Cc: linux-raid@vger.kernel.org
> Subject: Re: New device for RAID array
> 
> On Fri, 13 May 2011 00:37:02 -0500 "Leslie Rhorer" <lrhorer@satx.rr.com>
> wrote:
> 
> > > -----Original Message-----
> > > From: NeilBrown [mailto:neilb@suse.de]
> > > Sent: Thursday, May 12, 2011 8:21 PM
> > > To: lrhorer@satx.rr.com
> > > Cc: linux-raid@vger.kernel.org
> > > Subject: Re: New device for RAID array
> > >
> > > On Thu, 12 May 2011 19:59:01 -0500 "Leslie Rhorer"
> <lrhorer@satx.rr.com>
> > > wrote:
> > >
> > > >
> > > > I read through the man page for mdadm a couple of times and did not
> spot
> > > how
> > > > to do this.  I currently have a RAID array that I need to upgrade
> from
> > > 1T
> > > > drives to 3T drives.  To accomplish this, I intend to create a
> larger
> > > array,
> > > > but with fewer spindles, and then rsync the contents of the old
> array to
> > > the
> > > > new.  Once I am done, I then want to stop the old array (/dev/md0)
> and
> > > start
> > > > up the new array under /dev/md0.  Do I have to stop the array and
> then
> > > > re-create it with all the same parameters, except the device target?
> > >
> > > For v0.90:  --update=super-minor
> > > For v1.x    --update=name
> >
> > 	Um, it will be a 1.2 array, so I take it if the current array is
> > /dev/md0, named RAID-Server:0 from /dev/sd[a-n], and the new array is
> > something like /dev/md4, named RAID-Server:4 from sd[q-x], then I stop
> both
> > arrays and enter
> >
> > mdadm --assemble /dev/md0 /dev/sd[q-x] --update=name
> >
> > 	Correct?  Of course then I need to update /etc/mdadm/mdadm.conf and
> > run `update-initrd`.
> 
> Yes, though you don't really need to change the name on the array unless
> you
> particularly want to.  Just changing mdadm.conf is enough to get it
> assembled
> as the "right" place.
> 
> I think the command you give will store "RAID-Server:0" in the metadata
> assuming 'hostname' or HOMEHOST in mdadm.conf is RAID-Server, but if it
> doesn't you can experiment with explicitly setting --name and --hostname
> on
> the command line.
> 
> NeilBrown