Re: FC3 ISO Weirdness
From: Kam Leo (kam.leo_at_gmail.com)
Date: Sun, 12 Jun 2005 17:44:47 -0800 To: Grand Demon <firstname.lastname@example.org>, For users of Fedora Core releases <email@example.com>
On 6/12/05, Grand Demon <firstname.lastname@example.org> wrote:
> Today I downloaded the four Fedora Core 3 ISO images. I calculated the
> md5 checksums with the md5sum utility and all four matched up to the
> expected values.
> However, when I burned the images in Nero (under Windows) and set it
> to verify the disks, Disk Two and Disk Three failed. It stated that
> certain Sectors could not be read. Those same two disks failed under
> Fedora Core's media test.
> I also tried to burn the Disk Two image in Toast (under Mac OSX). When
> that verified the disk, it also failed with 'Sector xxx could not be
> read' errors. I went through with the install anyway. Disk one's files
> worked fine (as expected), but Disk Two failed out on one file. When I
> tried the second Disk Two disk (the one I burned under Mac OSX) did
> work, however. I didn't have many files coming off Disk Three, so it
> didn't fail. Disk Four also went fine.
> What I am wondering is two things. 1) Why would the verification and
> burning of the disks fail under two different OSes and burning
> programs despite the md5 checksum being correct? 2) Why would the Mac
> OSX-burned disk be corrupted in different areas than the
> Windows-burned disk?
> I have not tried to burn/verify Disk Two and Three under Linux because
> I don't want to "waste" another CD-R. I assume it will generate
> similar results. Any insight on what occurred here would be great. The
> install was successful so that isn't the problem... I am just curious
> as to what caused these anomalies...
> Grand Demon
Media as well as burners are not created equal. Your burner may not
have a burning algorithm that exactly matches this particular
manufacturer. Although the media may be listed as 48X or higher you
may need to use a much lower speed in order to get satisfactory
results. Try setting the burn speed to 10X or 12X. If you bought
really cheap or no-name brand media you may need to go even lower.
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