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Re: [ARSCLIST] CD-R error rates
Warmup times are important as well.
According to the manual, for consistent test cycles of error rates,
StageTech EC2 requires twenty minutes of warmup and five minutes of play
time. For HF measurements these numbers are 120 and 60, respectively.
--
Parker Dinkins
on 1/7/08 11:27 AM US/Central, George Brock-Nannestad at pattac@xxxxxxxx
wrote:
> From: Patent Tactics, George Brock-Nannestad
>
> Jerry Hartke commented on Parker Dinkins, and I have a query:
>
> ----- has anybody tried to perform two or more consecutive tests on the same
> tester under two conditions: 1) do not cause any change of the position of
> the CD on the hub (merely run the test several times) and 2) open and close
> the drawer or physically rotate the CD on the hub by a known amount?
>
> Mechanical drive problems or at least the range to be expected in any test
> should be demonstrated that way.
>
> Kind regards,
>
>
> George
>
>
> Jerry:
>> Even expensive testers can give different results. Although software can
>> cause differences, the culprit is usually the drive. Anyway, E12 and E22
>> error rates are far more important because they represent errors that are
>> approaching an uncorrectable state, and can result in read failure after
>> degradation caused by handling and storage.
>
>>
>>>
>>> on 1/7/08 12:37 AM US/Central, Richard L. Hess at
>> arclists@xxxxxxxxxxxxxxx
>>> wrote:
>>>
>>>> So, looking at it this way, what is an acceptable C1 rate for audio?
>>>
>>> Maximum of 220 errors per second, according to the inventors.
>>>
>>>> What are others getting?
>>>>
>>>> I had a client ask me how I was burning CDs earlier this year. They
>>>> have some flavour of Clover analyzer and my CDs were showing lower
>>>> error rates than their in-house CDs--that was a pleasant surprise!
>>>
>>> Plextor/Plextools can be somewhat misleading as a test platform. The
>>> errors
>>> on our Stagetech EC2 run two to four times higher for the same discs.
>>>
>>> --
>>> Parker Dinkins
>