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Posted by Bill's News on 05/21/06 22:39
Voinin wrote:
> Bill's News wrote:
>> Voinin wrote:
>>> When I record a DVD I turn verification on. (I got into the habit
>>> when I used a tape backup drive back in the day.) When the disc
>>> is
>>> being burned it starts out at 8x and finishes at 8x. So it seems
>>> that during burning it's using CLV mode. However, when the
>>> verification process is running the speed varies from slow to
>>> about
>>> 8x at the end. So it's apparently using CAV mode. But when I rip
>>> a
>>> single-layer DVD the download speed approaches 16x towards the end
>>> of
>>> the read. This process, too, apparently uses CAV mode.
>>>
>>> My question: Why does the verification process take longer to
>>> read
>>> than it does when burning or when ripping a DVD?
>>>
>>> FWIW I'm using Nero 7, but this phenomenon happens with other
>>> software I have used to burn discs.
>>
>> If your drive supports PIE/PIF, use Nero's tool kit item
>> "CDSpeed.exe" to check for errors from which the drive is
>> recovering. This will also give you a good understanding of your
>> media quality and is a much better test than "verify."
>
> What is PIE/PIF?
There are countless Google refs to PIE/PIF and this search term might
help
"what is" pie/pif
Basically, some drives report the internal error recovery results and
some diagnostic software will graph the values. It is important to
note that not all drives will report the same errors for the same
physical disc. To make the graphs meaningful to yourself it seems
best to select, or create, a benchmark disc which gives good results
in as many drives as you will be using - then compare subsequent tests
on whichever drive you're using to its benchmark values.
The time to run one of these tests is somewhat faster than verifying.
The reason behind your "slow" verify step would be more obvious, I
think.
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