media check fail

[Knute Johnson]

Thanks very much Bob.

knute...

>Knute Johnson wrote:
>> I've read several people say they did a SHA1SUM on the disks.  Is
>> that possible or did they actually do it to the ISO file?  If it is
>> possible, could some body tell me how to do it?
>> 
>> Thanks,
>> 
>> 
>
>For what you have on the hard drive:
>sha1sum something.iso
>
>For what you have burnt:
>a. mount the cdr
>b. df
>c, get the number of 1 k blocks on the cdrom device, divide that by 2
>to get the number of 2k sectors. d. unmount the cdr d. readcd
>dev=/dev/hdc f=- sectors=0-<number of 2k sectors> | sha1sum
>
>To avoid read errors or incorrect sha1sum do not use readcd without
>specifying the sector count.
>
>Substitute /dev/<your device> for /dev/hdc as required.
>
>If you are using a dvd device to read your cdr you might get away
>with: dd if=/dev/hdc bs=2048 count=<number of 2k sectors> | sha1sum
>instead of readcd.
>
>
>HTH
>Bob
>
>

-- 
Knute Johnson
Molon Labe...