From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roman Mamedov Subject: Re: RAID6 issues Date: Tue, 13 Sep 2011 14:44:24 +0600 Message-ID: <20110913144424.64348c41@natsu> References: <20110913082511.3c34dec9@notabene.brown> <20110913084419.380babcc@notabene.brown> <20110913093850.606efa70@notabene.brown> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/x/daAc6SRyMRbt7ZZogIqdF"; protocol="application/pgp-signature" Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Andriano Cc: NeilBrown , linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/x/daAc6SRyMRbt7ZZogIqdF Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 13 Sep 2011 17:51:56 +1000 Andriano wrote: > Apparently you're right > blockdev --getsz /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg > /dev/sdh /dev/sdi /dev/sdj /dev/sdk > 3907027055 > 3907027055 > 3907029168 > 3907029168 > 3907029168 > 3907029168 > 3907027055 > 3907029168 > 3907029168 > 3907029168 >=20 > sdb, sdc and sdh - are smaller and they are problem disks >=20 > So what would be a solution to fix this issue? You mentioned you use Gigabyte EP35C-DS3 motherboard. Gigabyte BIOSes are k= nown to cut off about 1 MByte or so from the end of HDDs (on the onboard co= ntroller, and maybe just the one on Port 0), setting an HPA area and storin= g a copy of the BIOS there. That's known as "(Virtual) Dual/Triple/Quad BIO= S". Google for "gigabyte bios hpa" and you'll find a lot of reports about t= his problem. You can check if you can disable that "feature" in BIOS setup,= but older boards did not have such option. To restore the native capacity of the drives you can use "hdparm -N" (see i= ts man page), while disks are on the non-onboard controller. In the future, create your RAID from partitions, and leave 8-10 MB of space= in the end of each disk for cases like these. --=20 With respect, Roman --Sig_/x/daAc6SRyMRbt7ZZogIqdF Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEARECAAYFAk5vF+gACgkQTLKSvz+PZwjikwCeK80Y2/KM5kcozvPzNGE7ioCJ Z90AnjEjdOprgZskdc2/PCZYUpBT7bjo =bC4B -----END PGP SIGNATURE----- --Sig_/x/daAc6SRyMRbt7ZZogIqdF--