Date: Tue, 4 Feb 2003 12:03:07 -0600 From: David Kelly <dkelly@hiwaay.net> To: questions@FreeBSD.org Subject: Re: How to map bad sectors on IDE? Message-ID: <20030204180307.GA64184@grumpy.dyndns.org> In-Reply-To: <20030201143148.C71938-100000@clubfoot.cracktown.com> References: <Pine.LNX.4.44.0301312140280.4225-100000@localhost.localdomain> <20030201143148.C71938-100000@clubfoot.cracktown.com>
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On Sat, Feb 01, 2003 at 02:52:38PM -0500, Joe O wrote: > The older "wd" ide driver used to have "bad144" bad block re-mapping, you > could scan a partition and the driver would remap hard error blocks at the > time of the initial scan to a reservred area of known good blocks. > Blocks that went bad from the time of that initial scan would need to be > added to the list of bad blocks to re-map using the bad144 utility. > > The current ATA framework no-longer supports this with fairly good > reasons. I haven't been following this thread closely so pardon me for butting in. I do not believe the old bad144 system had anything to do with ATA. It originated with VAX hardware. Bad144 managed spares in the disklabel. To this day, disklabel(5) still supports spare blocks. Over and above the low level ATA stuff. Problem is that SCSI specified how to manage bad block lists, how to list and edit the bad blocks. ATA/IDE didn't for a long time and as a result the only prayer you have of managing a bad block list on an ATA drive is with the manufacturer's utility. If even then. If somehow a bad block gets past the ATA built-in controller, that indicates the ATA drive is out of spares and begging for replacement. But if you want to continue there is a badsect(8) utility in FreeBSD which will create a file on top of the bad block. So from then on you simply stay out of that file. -- David Kelly N4HHE, dkelly@hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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