Hello , I have a Sony DW-D22a DVD writer which is flashed with firmware for Sony DRU-710a ( done this over a year ago to support 8+ speed discs ) just bought some Panasonic 16x DVD-r discs ( manufactured by Tayio Yuden ) only to find out drive will only burn at 16x for DVD+r !!!
so tried burning on them @ 8x but wont play on any DVD players in house !!!
what could the problem be ???

I have no awnser for you but did get these search results:

One other caveat: Be especially careful to check the media speed if you plan to use the discs with a DVD recorder. Set-top recorders can be more finicky than optical burners in computers, and sometimes they won't recognize newer media speeds, let alone newer types such as double-layer and dual-layer discs. For example, if you have a DVD-RW set-top recorder that records at 2X, it may not recognize the newer 4X or 6X discs. And double-layer and dual-layer media may play back on set-top recorders (may being the operative term, as cross-compatibility is not one of the technology's strong suits), but you won't be able to record to them. Later this year, I expect we'll see the first double-layer or dual-layer set-top recorders; Pioneer has already announced a model for release in Japan.

http://www.pcworld.com/howto/article...,120440,00.asp

Also:

http://www.google.com/search?sourcei...0+8x+wont+work


Hope this is better than nothing