Troubles with MD5SUM

[Jim Ruxton]

Ladislav Svatos wrote:

>On October 16, 2003 11:27 pm, Jim Ruxton wrote:
>  
>
>>I'm trying to verify rh9 .isos on cds I've burned but I keep getting I/O
>>errors or it just doesn't finish. I've downloaded them from RH's ftp
>>server and checking them on my harddrive they are fine. Any ideas why I
>>would have trouble with md5sum on CDs?
>>I'm doing :
>>md5sum /dev/cdrom
>>
>>Thanks,
>>Jim
>>    
>>
>
>Since the CD is padded with zeros you have to get block count first:
>
>df -k /mnt/cdrom
>
>umount /mnt/cdrom
>
>Use the block count from the df command:
>
>dd if=/dev/cdrom count=block_count bs=1024 | md5sum
>
>You can also use the media check option after you boot from the CD.
>
Thanks Lada,
I tried this and get a result saying
2+0 records in
2+0 records out
c99a74c555371a433d121f551d6c6398  -

This last number is not the correct md5sum and it happened too quickly 
which makes me think it didn't read off the cd.

>You can also use the media check option after you boot from the CD.

Yes this seems to work ok but I'd like to figure out the md5sum issue as well. 

Thanks again,
Jim

 

>
>Lada
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>  
>



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