From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roman Mamedov Subject: Re: Convert RAID5 to RAID6 in a live system Date: Wed, 23 Mar 2011 13:14:24 +0500 Message-ID: <20110323131424.70a0e08a@natsu> References: <201103230843.59080.stefan.roese@gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/FpMuekyPoxjU8c6_4XGY+jm"; protocol="application/pgp-signature" Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Mikael Abrahamsson Cc: Stefan Roese , linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/FpMuekyPoxjU8c6_4XGY+jm Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Wed, 23 Mar 2011 09:07:56 +0100 (CET) Mikael Abrahamsson wrote: > On Wed, 23 Mar 2011, Stefan Roese wrote: >=20 > > I'm currently in the process of converting a 3 disk RAID5 array into a 4 > > disk RAID5 array. I'm using mdadm 3.1.4 and Linux kernel 2.6.35-28-gene= ric > > (Ubuntu). My questions now is this conversion save in a live (running) > > system? Or is this now allowed/supported? >=20 > I guess you wanted to say "4 disk RAID6 array"? >=20 > In that case, yes, I have done it on 2.6.32 and mdadm version (something= =20 > older) and it went just fine. >=20 > Neil wrote about it here . Additionally, I suggest that you also check "man mdadm" and note the "--layout=3Dpreserve" option, if you use it, the RAID5 to RAID6 conversion = while adding one disk will happen instantly, without restriping (but only with a resync of the new drive). --=20 With respect, Roman --Sig_/FpMuekyPoxjU8c6_4XGY+jm Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEARECAAYFAk2Jq+AACgkQTLKSvz+PZwhpWACeKU/2tlENCjOhZvFNJq+7Z4wl ZRsAn1VaSqP6D2Ys4+RqQMqdtUmE0Yg+ =8Gqx -----END PGP SIGNATURE----- --Sig_/FpMuekyPoxjU8c6_4XGY+jm--