Also be aware that a lot of 'branded' blank DVDs are NOT necessarily as per the branding. There is a lot of rubbish out there and a quick Google for DVD disk quality will give you a clue. Some of the 'cheaper' stuff has been assesssed as up to 90%+ unreliable both in recording and durabilty of the recording due to poor dye in the manufacture. There is at least one thread here about it too.
A quote from one site on the bottom of the range stuff:
Pathetic garbage media, landfill material, about 0-50% success rate. These discs are pretty much only suited for preventing drink cup rings from forming on a table. Most of the time, these are ready-made coasters. If you can actually get a burner to acknowledge the disc, do not expect much, and if the burn actually succeeds, do not be surprised if a DVD-ROM or player chokes on the disc (read/play errors). Cheap prices, cheap junk quality.
I recently warned a business friend about this and he discovered he needed to re-issue 500 commercial disks to customers
