Date: Sun, 11 Mar 2001 22:15:43 -0800 From: "Ted Mittelstaedt" <tedm@toybox.placo.com> To: "Alexey Koptsevich" <kopts@astro.ioffe.rssi.ru>, "Poul-Henning Kamp" <phk@FreeBSD.ORG> Cc: <questions@FreeBSD.ORG> Subject: RE: bad144 Message-ID: <005301c0aabb$de4453c0$1401a8c0@tedm.placo.com> In-Reply-To: <Pine.BSF.4.21.0103111849540.1391-100000@astro.ioffe.rssi.ru>
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Hi Alexey If you ever see a bad block from a modern IDE or SCSI disk that is permanent (ie: rebooting doesen't clear it) then there's something wrong with the drive electronics. Modern disks automagically and silently remap bad sectors on the fly. bad144 doesen't work with LBA disks, just CHS, and the only thing that uses the bad block table that bad144 wrote out is the old wd driver which has been replaced by the atapi driver. If your paranoid then if your attempting to verify a SCSI disk, you can use scsicontrol (camcontrol) to issue a SCSI format command to the disk. If your paranoid and running IDE (which if your that concerned with data integrity you wouldn't be running IDE) and you want to verify it, then boot the system with a bootable DOS floppy and run the appropriate "low-level" formatting and verification tool from the drive's manufacturer. Ted Mittelstaedt tedm@toybox.placo.com Author of: The FreeBSD Corporate Networker's Guide Book website: http://www.freebsd-corp-net-guide.com >-----Original Message----- >From: owner-freebsd-questions@FreeBSD.ORG >[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Alexey >Koptsevich >Sent: Sunday, March 11, 2001 8:54 AM >To: Poul-Henning Kamp >Cc: questions@FreeBSD.ORG >Subject: bad144 > > > >Hello Poul-Henning, > >May I ask what was the reason for removing bad144 from 4.x? It seems to me >it was quite useful utility in many cases. E.g., I temporarily move data >from failed drive to another one and I want to know immediately are there >bad blocks on the replacement drive or not. Why should I rely upon >capability of modern drives to remap bad blocks? Or should I store 3.x >somewhere just for this purpose? > >Is it possible to get bad144 back? > >Yours, >Alex > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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