Date: Wed, 4 Oct 2000 17:04:18 -0700 (PDT) From: Doug White <dwhite@resnet.uoregon.edu> To: Jaye Mathisen <mrcpu@internetcds.com> Cc: hackers@FreeBSD.ORG Subject: Re: IDE drives doing BBR? Message-ID: <Pine.BSF.4.21.0010041702350.55166-100000@resnet.uoregon.edu> In-Reply-To: <Pine.BSF.4.21.0010041251240.32574-100000@apocalypse.cdsnet.net>
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On Wed, 4 Oct 2000, Jaye Mathisen wrote: > Remember reading on hackers somewhere that newer drives like IBM supported > this feature. I'm getting a few bad blocks on a 75GB IBM drive (at least > according to the ata driver), and rather than replacing it and moves on, > the disk basically dies. > > However, I run the IBM drive fitness test, it works some magic in there > writing data to the drive, and the drive is back, and the failed block now > seems fine. > Ran into this today actually ... Yes the IBMs do automatic block remapping ... you may have to scrub the disk a few times to get the bad blocks out. Now you have 75GB of potentially bad blocks so you have to scrub pretty completely. > Or do I just write nul's to the block or 0's, and it's supposed to do it > automatically? or do I just punt. 'dd if=/dev/zero of=/dev/ad1 bs=4k' works great; takes about an hour to scrub the entire disk. Run until clean. Running it right now in fact. Doug White | FreeBSD: The Power to Serve dwhite@resnet.uoregon.edu | www.FreeBSD.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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