From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roman Mamedov Subject: Reshape RAID5 to a RAID6 with more (smaller) devices Date: Wed, 12 Jan 2011 12:29:30 +0500 Message-ID: <20110112122930.6a17440f@natsu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/.wwkdEEC2opWGpJpQ8vm/Zf"; protocol="application/pgp-signature" Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/.wwkdEEC2opWGpJpQ8vm/Zf Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hello! I am considering to move my configuration in which I currently use two RAID5 arrays (3*2TB and 3*1TB) to one described in [1]. Specifically, make a 6*1TB RAID6 plus 3*1TB RAID5 consisting of 2TB drives' "tails". My question is: does mdadm support a simultaneous reshape, changing at once: 1) RAID5 to RAID6 2) number of devices from 3 to 6 3) individual device size from 2TB to 1TB Note that the user-accessible space after this reshape does not change, and remains at 4 TB. So is that supported? Will that require a backup file? Will that proceed particularly inefficiently/slowly? [1] http://www.linuxconfig.org/prouhd-raid-for-the-end-user --=20 With respect, Roman --Sig_/.wwkdEEC2opWGpJpQ8vm/Zf Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAk0tWFoACgkQTLKSvz+PZwieOQCePU8gUge4mYUkFuQ7kdfXVOoc BuAAni7EiTjApn9o53SFgvOuVBlbMfri =fte9 -----END PGP SIGNATURE----- --Sig_/.wwkdEEC2opWGpJpQ8vm/Zf--