RE: New device for RAID array

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> -----Original Message-----
> From: NeilBrown [mailto:neilb@xxxxxxx]
> Sent: Thursday, May 12, 2011 8:21 PM
> To: lrhorer@xxxxxxxxxxx
> Cc: linux-raid@xxxxxxxxxxxxxxx
> Subject: Re: New device for RAID array
> 
> On Thu, 12 May 2011 19:59:01 -0500 "Leslie Rhorer" <lrhorer@xxxxxxxxxxx>
> 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`.

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