From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: Shrinking number of devices on a RAID-10 (near 2) array Date: Fri, 29 Aug 2014 14:35:28 +1000 Message-ID: <20140829143528.588cf640@notabene.brown> References: <20140823163110.GE11855@bitfolk.com> <20140824130939.461501b4@notabene.brown> <20140824143944.GC19874@bitfolk.com> <20140825103234.GH11855@bitfolk.com> <20140825212614.5be558c9@notabene.brown> <20140825113402.GF19874@bitfolk.com> <20140829135312.5a6e78bc@notabene.brown> <20140829040231.GP19874@bitfolk.com> <20140829141812.17c35df7@notabene.brown> <20140829042618.GQ19874@bitfolk.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; boundary="Sig_/wZxCZG=udUaEbWA8Ln+39wY"; protocol="application/pgp-signature" Return-path: In-Reply-To: <20140829042618.GQ19874@bitfolk.com> Sender: linux-raid-owner@vger.kernel.org To: Andy Smith Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/wZxCZG=udUaEbWA8Ln+39wY Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Fri, 29 Aug 2014 04:26:18 +0000 Andy Smith wrote: > On Fri, Aug 29, 2014 at 02:18:12PM +1000, NeilBrown wrote: > > Of course 'size' is in kilobytes, not sectors (which moron did that !??= !?!) > >=20 > > echo 309363696 > /sys/block/md2/md/dev-sda3/size >=20 > Sorry, still no joy: >=20 > # echo 309363696 > /sys/block/md2/md/dev-sda3/size > # cat /sys/block/md2/md/dev-sda3/size > 309363264 Try use "/bin/echo" so you get an error message. Also try smaller numbers. Can you write anything larger than what is alrea= dy there? Increasing by 64 (match the 128 sectors that mdadm wants for new_offset) should be enough. NeilBrown --Sig_/wZxCZG=udUaEbWA8Ln+39wY Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIVAwUBVAADEDnsnt1WYoG5AQJyAg/9Em0lbHq2/T532OOiWyT28PfqqvEjJ/z6 eQSxMu+AFOYBRgdbxukfunDC9mSCwjel5a9V2gAOlTCGjs3akt8RShVQJIqUB5/a BakI3QHmt6X/90ImD2pxrEWTzfQEbmsiYdzGC/i0J1DuzPLiGwK26D5j6x6+Owhz uPzlb7rAZlqNp418n9rjnZHScE4cZCdgw5PgjqapVcwOhBcVC+zpILm5HU55XFax Q+AKFRBjFbPCy99AMgJtW6pfXrO3spN22+2Q2cm76DoRGz74zr8ULshxhCUDjTNr GFl+m8QjdXJ0hSewrW1JX11BA3u5AmdnhVL6FCyE95frB1FzM8iXh/veDl1D+feb EPfce3aZB7wE1Qlvavxibz6PqYFkX4fXwfDbkOaD/2v+xHzM+Md4BG317i5eXnng xkpERZsrA97DR9yB7WpuDQk4/PSqx7w3xYhm6tdgwYJ0vnZ3xHdTLlYRlP+5kEbd OaqBmiwoRCVscpYVcRqKb/++lnoFAjGGIvfu9taoKJq51iBoO1z4DcyVgyAAtZze Sp+rfPy8a6deqoofalXrFC81a11+F5NZlAfa169PJywb2lUoSP1Jegn0h+gsTp4m xRmSY8jaHpGck2kwpH+oqBOSjO8uU9UXvix4IvQsjQVXuPDt+eoMGNr/wUbol3aD ZKp6IsUYnOA= =Ux0a -----END PGP SIGNATURE----- --Sig_/wZxCZG=udUaEbWA8Ln+39wY--