CD will not boot correctly

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cmetcjr
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CD will not boot correctly

Postby cmetcjr » Sun Sep 02, 2007 6:51 pm

Hello, I have LinuxMint Cassandra Gnome edition on a bootable disc.
I tried to boot into it and it eventually just spits out I/0 buffer errors and saying it can't read the CD. I have burnt 2 different copies of the ISO and they both give me this issue. What is going on and how do I fix it?

Motherboard: ASUS A8N-SLI Deluxe
CPU: AMD 2.4GHz
Memory: 1GB PC2700 333MHz
Hard Drive: Seagate 160GB
Boot Drive: Plextor DVD-RW

Thanks,
cmetcjr

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Boo
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Postby Boo » Sun Sep 02, 2007 9:01 pm

did you check the md5 checksum of the downloaded iso.

check out:
http://www.linuxmint.com/wiki/index.php ... ur_Live_CD

also how did you burn it? what os and app?

:D
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Now where was i going? Oh yes, crazy!

cmetcjr
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Postby cmetcjr » Sun Sep 02, 2007 11:01 pm

Boo wrote:did you check the md5 checksum of the downloaded iso.

check out:
http://www.linuxmint.com/wiki/index.php ... ur_Live_CD

also how did you burn it? what os and app?

:D


No, I didn't check the md5 checksum, I don't really know what that means.
I burnt it with Active ISO Burner 1.1

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Boo
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Postby Boo » Mon Sep 03, 2007 12:10 am

If you go to the Mint Downloads page you will notice a row "MD5" under the release name. eg Cassandra.

so for the edition of mint you have go down to the MD5 row.
this MD5 value will look like a big mess of numbers and letters.
this is a unique value for the iso file used to check if the iso you downloaded is the same as the one on the site.
some cd/dvd burning software will calculate this value for an iso you want to burn. otherwise you need an md5sum application, it is part of all linux systems. if you are using windows google for a windows md5sum application and install it.

so what you do is run the md5sum application on the iso you downloaded.
eg:
md5sum file_name.iso
you check the value given against the one on the site and if they are the same your iso is good to burn. if they are not the same then something went wrong with the download and broke the iso.
this means you have to download the iso again. :(

hope this helps.

:D
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Now where was i going? Oh yes, crazy!

cmetcjr
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Postby cmetcjr » Mon Sep 03, 2007 2:20 am

Alright, checked md5checksum with md5sum.exe
It is fine, so the two discs I made should have worked right?

What else could be the problem?

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Boo
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Postby Boo » Mon Sep 03, 2007 8:33 pm

another problem can come from older CD burners and/or older cd burning software that can not really handle burning iso's that are close to 700MB in size.

there could be a hardware irq issue.
you could try putting a boot option of irqpoll when the CD boots.
when the CD boots hit F6 and at the end enter irqpoll.

:D
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Now where was i going? Oh yes, crazy!

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linuxviolin
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Postby linuxviolin » Mon Sep 03, 2007 8:51 pm

Maybe also a problem with burning. At what speed you did burn? It is advised to burn ISO at the lowest possible speed (in general 4x) to avoid the problems.
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cmetcjr
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Postby cmetcjr » Tue Sep 04, 2007 12:41 am

well, i didn't try the irqpoll thing, because when i rebooted i completely forgot what to type in, I'll try it later.

I did try to write the iso at 2x speed, and it still gives me the same errors.

Does anyone know if there could be hardware issues other than the burner?

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Postby Husse » Wed Sep 12, 2007 4:48 pm

Going through the forum I stumbled over your post. Can you post the exact error messages (or at least as exact as yo can - I know it can be hard to do this)
i/o errors sounds like the CD but....
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