Date: Thu, 14 Jun 2001 15:32:51 +0200 From: "Karel J. Bosschaart" <karelj@wop21.wop.wtb.tue.nl> To: questions@freebsd.org Subject: problem reading one or more particular file(s) from CD Message-ID: <20010614153251.A86540@wop21.wop.wtb.tue.nl>
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Hi, I have a problem reading some files off CD's that I burnt with the mkisofs/cdrecord combo; I mount it as usual, and copy the contents. However, one of the files is not copied, as cp says "Bad address", while the console shows Jun 14 14:41:30 wop21 /kernel: cd9660: Joliet Extension (Level 3) acd0: READ_BIG - ILLEGAL REQUEST asc=64 ascq=00 error=01 vm_fault: pager read error, pid 86366 (cp) (the first line is from the mount command) I thought this to be some bad spot on the CD, but it happens more often than would be reasonable, as I had yesterday 4 of such CD's in a row, and I had similar trouble in the past, sometimes with more than just one file. Also, it happens consistently always on the same file(s), and in both of my CD players (both SCSI). I tried on other machines: a 4.1.1-STABLE with IDE drive: same problem, as well as on another 4.3-RC with IDE. When dumping the CD content with dd to the harddisk and mounting the image using vnconfig, I can copy the 'lost' file without any trouble! Also, firing up VMware with NT4 will let me copy that file. A Win'98 box didn't give me any trouble copying that file. Finally, I found a FreeBSD box (4.3-STABLE with IDE drive) that is able to copy the particular file, and it never failed (I tried 10 times or so). Does someone has an idea as where to start searching for the problem? I'm getting a bit concerned about the safety of my data on CD. Maybe important: it appears (at least in the 4 cases from yesterday) that it concerns the file that was last written to the CD, which is also filled up almost entirely (648 to 650 MB, with 1 MB = 1024*1024). But from the findings with dd, VMware, Win'98 and that particular FreeBSD machine I'd say that the iso is correct and complete. Karel. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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