OT: Aging Discs - Bad Sectors

Dach schrieb am 18.01.2013 um 20:45 Uhr

I recently revisited a DVD-R disc that was originally burned in 2005 and discovered that it know longer played with out interruption. After running the disc through Nero Disc Speed it was discovered that the disc indeed had bad sectors.

Do bad sectors happen at the time of burning or is it possible as the disc ages that they can be created?

In continuing my audit I've discovered a number of discs with this issue. Has anyone else had this experience?

- Chad

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riredale schrieb am 26.01.2013 um 01:30 Uhr

Good to hear from you, John.

Yesterday I dredged up my only double-layer (~8GB) DVD project, done back in the fall of 2006, for a play representing about 3 hours of video material. The disk used was a Verbatim inkjet-printable DVD+R DL. I had burned maybe a hundred at that time; this disk was my personal copy.

Ran it through the Nero utility and you can see the results here. Note that after looking at the whole disk quickly I ran the program a second time focusing only on the outer edge (at about the 4GB position), which is where the layer break takes place and where errors usually happen, anyway. In this case, the errors are extremely low (well within the green zone on the lower graph and these errors are fully correctable. And this after six years and a DL disk!

johnmeyer schrieb am 26.01.2013 um 02:57 Uhr

Great to hear that the DL is holding up well. I've done very few tests on those because I've only burned about a hundred over the years.

Thanks for all the replies on my TDK error. That was a definite senior moment (I'm over sixty now, so in addition to being long-winded, I'm now making errors ...). JVC is correct, and I've gone back and edited my post so that TDK still shows (so the comments above still make sense), but anyone reading the post for the first time will realize that JVC is the correct brand.

PeterDuke schrieb am 26.01.2013 um 11:11 Uhr

Keeping track of who owns what is a full time business. Yes, JVC now owns TY, and for the record, Imation now owns TDK.

Nero DiscSpeed (formerly known as CD-DVD Speed) is available for free from

http://www.nero.com/enu/downloads/

(See the Free Tools at bottom-right of the web page)

It doesn't list Windows 7 compatibility on that page, but it works for me (64-bit version).

The ScanDisc function tells you when you have a problem, but does not tell you when a problem is looming (correct me if I am wrong). I scanned several old DVDs I burnt about 10 years ago and they all reported completely Good (green).

However when I used the Disc Quality function, which requires a LiteOn burner (or other burner with the same chipset), I was able to see the soft errors before error correction. For a DVD, these are PIE (parity inner error), and PIF (parity inner failure), also known as POE (parity outer error). The POF (parity outer failure - hard errors that are not correctable) are also displayed, but it would now be too late. (These should also show up during ScanDisc.) My old DVDs showed alarmingly high PIF in a few cases, prompting me to make copies before it was too late. (I don't know whether these high values were always there or whether the discs had deteriorated, because I did not do such tests back then.) The discs were made by Princo, which I bought because they were cheap and seemed to work OK.

DiscSpeed also reports CD errors (C1 and C2) and if you have a LiteOn BD burner, the BD errors LDC and BIS, whatever they might mean.

Grazie schrieb am 26.01.2013 um 11:24 Uhr

Peter thanks for the Nero Link. Very useful.

Cheers

Grazie

vkmast schrieb am 26.01.2013 um 13:38 Uhr

>>>Keeping track of who owns what is a full time business. Yes, JVC now owns TY...<<<
or the other way around?
http://www.digitalfaq.com/forum/media/1760-jvc-takes-taiyo.html
Taiyo Yuden Co., Ltd. financial statement 3/31/12 lists their 65% ownership of Victor Advanced Media and JVC Advanced Media.

PeterDuke schrieb am 26.01.2013 um 14:39 Uhr

You could be right. This is from
http://www.yuden.co.jp/ut/company/information/history.html

2007 Jan. Establishes Niigata TAIYO YUDEN CO., LTD. in Joetsu-shi, Niigata.
2007 Feb. TAIYO YUDEN ENERGY DEVICE CO., LTD. makes into a consolidated subsidiary.
...
2008 Oct. Victor Advanced Media Co., Ltd. makes into a consolidated subsidiary.
2010 Mar. TAIYO YUDEN Mobile Technology Co., Ltd. makes into a consolidated subsidiary

The sentence construction is poor, but I think it means that these companies became subsidiaries of TY.