From mboxrd@z Thu Jan  1 00:00:00 1970
From: NeilBrown <neilb@suse.de>
Subject: Re: Shrinking number of devices on a RAID-10 (near 2) array
Date: Fri, 29 Aug 2014 14:18:12 +1000
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To: Andy Smith <andy@strugglers.net>
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On Fri, 29 Aug 2014 04:02:31 +0000 Andy Smith <andy@strugglers.net> wrote:

> Hi Neil,
>=20
> On Fri, Aug 29, 2014 at 01:53:12PM +1000, NeilBrown wrote:
> > You need to
> >   echo 618727392 > /sys/block/md2/md/dev-sda3/size
> > and same for the other devices.
> >=20
> > I looks like I need to get mdadm to be more clever when it gets -E2BIG.
> > Can you check that the above works?
>=20
> Unfortunately it seems I cannot change that size:
>=20
> # echo 618727392 > /sys/block/md2/md/dev-sda3/size
> # cat /sys/block/md2/md/dev-sda3/size
> 309363264
>=20

Of course 'size' is in kilobytes, not sectors (which moron did that !??!?!)

echo 309363696 > /sys/block/md2/md/dev-sda3/size

NeilBrown

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