From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: Running check and e2fsck simultaneously Date: Mon, 11 Nov 2013 07:34:28 +1100 Message-ID: <20131111073428.583b83b2@notabene.brown> References: <527FCBAF.4070208@hardwarefreak.com> <58CD4AD8-0A1E-42E8-984D-F4727EE2B8F0@gmail.com> <527FDBC1.4000009@hardwarefreak.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/JFaWyh._GOt6RfhRpNyCPOo"; protocol="application/pgp-signature" Return-path: In-Reply-To: <527FDBC1.4000009@hardwarefreak.com> Sender: linux-raid-owner@vger.kernel.org To: stan@hardwarefreak.com Cc: Ivan Lezhnjov IV , "linux-raid@vger.kernel.org" List-Id: linux-raid.ids --Sig_/JFaWyh._GOt6RfhRpNyCPOo Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Sun, 10 Nov 2013 13:17:21 -0600 Stan Hoeppner wrote: > Also, I see little/no value in running a scheduled mdadm check on a > RAID1 array. Any problems with RAID1 will be due to one of the disks > beginning to fail in some mode, usually requiring sector relocation. I think scrubbing has value on any RAID with redundancy. The firmware can only relocate a sector if it reads it when it is marginal but not yet completely lost. If a sector is not read for a long time and during that time the media degraded beyond recovery the firmware cannot do anything. But RAID1 can - it can get it from the other device. NeilBrown --Sig_/JFaWyh._GOt6RfhRpNyCPOo Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iQIVAwUBUn/t1Dnsnt1WYoG5AQLWhw/+MPJdExUJV9HdVXDZ9K/+4FMWHlKsvHnC 1dl3qWszHOXIUhOn7WtO4u+DjJjPqmnZGHqOsPnVnimaqmFh8Jfn0Yw8bjXr7r3c FYgjqJI3wrjmR36Bv+daVIRgvC0BPsQi6On9QEs/qKWZprfuEyojKOFjGylCpZKe Fz6jn1k4f4iS5QZxk4eSsyL9TJeVg5jtnmY6FxeO9+9L1yqVcVobAdUOEISOU6vQ NUcPq/atDgDpr6LMXEosKzLYmn5WZJUQ3D8hEcCzQkF59JYHc2Ig6b3k1/yaiJvO y3197wbE38oEWds8qN4hjprZujRybI9qnjc9EvwvOoLVSU1VSPGLvMEUuNfZXbe1 /+OMC7PYSTkRmjAPLE/NvsF+jvDUZWkWiKLtoFohnubXXH29Kb8GpUuCBVAojyRO UkdeD2WZEA/GcykYYor7adny0y47YRiBxQn9YisC/tRnbNg9pgYy/5scmA3SvKqo VAun7Xds49HDQ0RSvCd62G3yicQPHUlPbJD8hvLYiglewivmHthfaoZhqhA/OshE eJPYToysSNe+0fhWMzalgNwL/yykRRrKRe0s5PDAjVk3qFUAu7O40CglOzU7em6/ oH9AJ7bdifPSraZe/5vRJzKmxBl6wpNFlI1LGnV9q1CFf/SvF4YmunTCYhJA9cxM 30Fa3N6TqBw= =nOjC -----END PGP SIGNATURE----- --Sig_/JFaWyh._GOt6RfhRpNyCPOo--