jjmckenzie51 at earthlink.net
Tue Nov 16 16:38:47 UTC 2004
Sorry for the top post but I'm replying through Earthlink.
md5sum -c MD5SUM checks the md5sum of each file named in a file named MD5SUM against the actual downloaded file. If the md5sum matches, the program will post the file name and the word PASS. If the md5sum does not match, the program will post the file name and the word FAIL.
Since the original disks worked in a laptop, the disks are not defective when used. It is more likely than not that his IDE controller is trying to run the CD-ROM drive in DMA mode, which with most CD-ROM drives does not work, thus he should attempt to use the disks again, but when the boot: prompt appears type in 'linux ide=nodma'. Hopefully, this will be 'fixed' before the release of the first test of FC4.
Also, as a side note, most downloads through the torrent do not need to be MD5 checked, as the program does a hash check of each piece that is downloaded. If the hash check does not pass, the piece is discarded and queued for download again.
From: Paul Howarth <paul at city-fan.org>
Sent: Nov 16, 2004 9:23 AM
To: For users of Fedora Core releases <fedora-list at redhat.com>
Subject: Re: FC3 coasters
Rick Lim wrote:
> Hi there
> I've downloaded FC3 via bittorent and burn all 5 disks, using these disk I
> upgraded my laptop from FC2 to FC3 with no problems.
> When I try to upgrade desktops with the same disks they fail, I have then
> tried a media check of the disks and they fail, so I've burn more disks only
> to have them fail.
> How does one go about checking the downloaded iso images are sound before
> burning a bunch of coasters?
Most likely all of your CDs are fine. Try booting using "linux ide=nodma".
You can check that your ISO downloads are OK by comparing the md5sums with
those published on the download site:
md5sum -c MD5SUM
where MD5SUM is the file of that name in the iso directory that you downloaded
the ISO images from
You can check that your burned CDs are OK by getting the data back off the CD
and either comparing the file with the original ISO or checking its md5sum.
dd if=/dev/cdrom of=burned-iso-1.iso bs=16384
cmp burned-iso-1.iso FC3-i386-disc1.iso
md5sum burned-iso-1.iso (then compare the result with that in the MD5SUM file)
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