Posted by Charlie+ on 02/06/07 09:46

On Mon, 05 Feb 2007 14:38:07 GMT, Eamon Skelton <Xnospam@oceanfree.net> wrote as
underneath my scribble :

Hi Eamon
The faults vary from recoverable (with recovery software) errors to one disk
witha few unreadable errors - all the 16X disks are still mountable at this
time.
Thanks for your observations as to recording speeds - yes, for sometime now I
have been buying only 8X speed disks and then recording at the write strategy
speed (4X) this would seem to be the safest for longevity but I have had no
failures under this regime yet.
If you read my OP carefully, you should be wary with your own method as some of
these 16X disks I recorded at 4X 8X and 16X and I am getting errors at all
recording speeds and this after only one year.
Media I use is always bulk drums but I check compatibility when I get a new drum
that the disks give perfect recordings with minimal error correction from the
drives (NEC). I would expect more longevity from branded disks but the ones I
have tested to destruction with heat and UV light have been no better than the
bulk, ( I havnt tested any archival rated disks as they are so expensive to use
in bulk) also you still get disks with visible flaws in the branded versions.
Please avoid interspersed posting, it is very confusing for other readers!
Charlie+

>On Sun, 04 Feb 2007 13:02:06 +0000, Charlie+ wrote:
>
>> I recorded on some 16X speed DVD-R disks at x4, x8 and x16. The
>> transfers were dated December 2005 and are now beginning to show faults
>> ie just over one year old.
>
>Are the faults unrecoverable errors or are the disks unreadable?
>
>> In comparison I have slower speed x4 and x8 DVD-R recordings which are
>> lasting without faults, having been kept in identical conditions. All
>> these disks have been kept dark and not over heated. All these disks
>> write strategy at 4X
>
>Disks that are written at high speed usually tend to have higer rates of
>corrected errors when you read them. This leaves less safety margin when
>the disk is approaching the end of it's life.
>
>I get the lowest rate of recoverable errors when I burn 16X rated DVDs at
>about 8X. Burning at 16X gives slightly higher recoverable read errors. I
>don't understand why, but burning at 4X often gives inferior results!
>
>What kind of media are you using? Is it compatible with your writer? Some
>writers are very fussy about media. For important backups, you should use
>high quality media like Verbatim or Taiyo Yuden. Verbatim DVD and CD-R
>media has a projected lifetime of 100 years. Presumably, you can claim
>your money back if it fails after 99 years.
>
>> Has anyone else noticed this propensity for rated high speed DVD-R disks
>> to age earlier than others? I notice they use a paler dye and I wonder
>> if there is a trade-off between speed and longevity? Real info. rather
>> than guesses would be interesting..! Charlie+
>
>I only bought my 16X writer about 6 months ago. All my old backups were
>written with my old 4X Liteon. So far, the 16X media is lasting well. I
>will be very disappointed if it doesn't last more than a few years.
>
>E.S.

[Back to original message]