From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jure =?UTF-8?Q?Pe=C3=A8ar?= Subject: Re: raid and sleeping bad sectors Date: Thu, 1 Jul 2004 01:27:19 +0200 Sender: linux-raid-owner@vger.kernel.org Message-ID: <20040701012719.7b2e16c2.pegasus@nerv.eu.org> References: <1088631655.5376.311.camel@star2.austin.ibm.com> <200406302244.i5UMiG332041@watkins-home.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <200406302244.i5UMiG332041@watkins-home.com> To: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Wed, 30 Jun 2004 18:44:16 -0400 "Guy" wrote: > I want plan "a". I want the system to correct the bad block by re-wr= iting > it! I want the system to count the number of times blocks have been > re-located by the drive. I want the system to send an alert when a l= imit > has been reached. This limit should be before the disk runs out of s= pare > blocks. I want the system to periodically verify all parity data and > mirrors. I want the system to periodically do a surface scan (would = be a > side effect of verify parity). And where do you propose the system would store all the info about badblocks? I have an old hw raid controller for my alpha box maintains a badblock = table in its nvram. I guess it's a common feature in hw raid cards, since i h= ad a whole box of disks with firmwares that reported each internal badblock relocation as scsi hardware error. Needless to say, linux sw raid freak= ed out on each such event. Things were very interesting untill we got firm= ware upgrade for those disks ...=20 Also, at least 3ware cards do a 'nightly maintenance' of disks which i = guess is something like dd if=3D/dev/hdX of=3D/dev/null ... What is holding y= ou back to do this with a simple shell script and a cron entry? Now for cheching the parity in the raid5/6 setups, some kind of tool wo= uld be needed ... maybe some extension to mdadm? For the really paranoid pe= ople out there ... :) --=20 Jure Pe=E8ar - To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html