From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: migrate to bad block list Date: Thu, 16 Oct 2014 17:54:14 +1100 Message-ID: <20141016175414.01334582@notabene.brown> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; boundary="Sig_/Yr4HBRvSGz2IUn=L239sauX"; protocol="application/pgp-signature" Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Michael Ryan Cc: "linux-raid@vger.kernel.org" List-Id: linux-raid.ids --Sig_/Yr4HBRvSGz2IUn=L239sauX Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Wed, 15 Oct 2014 17:18:19 +0000 Michael Ryan wrote: >=20 > Is there any way to migrate an existing array created with mdadm v3.2.5 a= nd using 1.1 metadata to use a bad block list?=C2=A0 I'm assuming not as th= ere wouldn't be space reserved for the list, but I need to ask. >=20 > Thanks for your response! mdadm tends to leave a fair bit of unused space on devices so that things like a bad block list can easily be added. If you can stop the array, then do that and re-assemble with --update=3Dbbl and you should get a bbl added to each device. If you cannot stop the array, but it has a bitmap, then you can, for each device: mdadm /dev/mdX --fail /dev/adevice mdadm /dev/mdX --remove /dev/adevice mdadm /dev/mdX --re-add --update=3Dbbl /dev/adevice I think that should work. The "bblk" is a feature of the device, not of the whole array. So you can add it to each device. I haven't actually tested the above I think, so it might be safest to make = an array with loop-back devices and experiment. NeilBrown --Sig_/Yr4HBRvSGz2IUn=L239sauX Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIVAwUBVD9rljnsnt1WYoG5AQI3IQ/+MeskICTD6UOMihoe7rX9QjTeuTpwKv7o xsIxL3/zaj1IOu5PjoAiCV9fCV/gC8Rd589z4jAW/VLjEOmYjqw+3ayGnQ2hlHuf mXyLz1cQ0NsVliIKMdEIuL62ka98NZUSkpzlH6cUBZ0TvElCj21lzyMTFqyGrHOh 6GsbokzIpdvXX4WUjUCwCcorqNO4K31MhnTSgb4/GofojkI9gTNJOsf8s7fK1tyA 9uEMtMxgnYq46TAVaN0iP39oTdF0+g4wgz81zc/RKI7CmEo62GJVp7c+Z0R+nTms qtl5WEoe4w4ZP8SLsGi6q/xAclfjXfQYo+wfE763O6B3hQoBhs3MdQtlbrkVXuhc seNDi7/8gXAZ4nlqPsnRyiu2M69SkMinafP0hgYo5vQsnBT5ugJ4JeJ41T48ueON iyriNgY06aBNMao1wXjlLhiqwHlRC+jV2OPY3XRVp64rSJOhpVoc1FMn+Pp/px9Z Xcq0aBpj1pQdfpqSvQ4Tyj4XjHlcFsupbm0DysUEhzRBJKF+i+HxUI7fDGIc20KF n+TyYGH02hP8jirg2Rkci1Or8JuRKisjUjIO23x5sWDi2Og6ovF70SIk+85fD/Yj KM8y9o/IDPIjTNU4HLKmZTyo+VKf+lQAbP1jeh2b78nKr0JFva8BpXU5RyB1y+Aa mQVAGxn4IeU= =yqYP -----END PGP SIGNATURE----- --Sig_/Yr4HBRvSGz2IUn=L239sauX--