question about burning and then reading (dd) to confirm sha256sum

g geleem at bellsouth.net
Thu Apr 2 01:15:37 UTC 2015



On 04/01/2015 02:18 PM, jd1008 wrote:
> After burning 3 DVD's, and reading them back to compute sha256sum.
> all three of them generated these error messages during readback,
> and all 3 messages show the error was past the 4gb offset.
>
> Is this a media issue or is it the burner?

1- burn dvd at 2 speeds lower than what you used and had failure.

if ok, problem is either burner or blanks.

2- burn dvd at failure speed on a different burner.

if ok, get a new burner. if failure, may be blanks.

3- try different program or burn from command line.

> A side question: why does the block io layer assume that all media
> have 512 byte sectors?

i believe that is a carry over from disk formatting started by the
IBM PC. [do not hold me to that]


-- 

peace out.

in a world with out fences, who needs gates.

CentOS GNU/Linux 6.6

tc,hago.

g
.



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