Question about HP dvd640e DVD±RW Dual Layer Burner

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HP dvd640e not recognizing DVD+R DL

Apple mini C2D using anything (Toast 8 usually). IF closing drive to mount in the Finder, I get a message the disc is not recognizable. If to Toast8, Toast says it sees a CD in one box, but the further "disc info" dropdown box shows it is a DVD+R DL. Writing to it then causes instant abort with error. 
I have used Memorex discs, and tried a Verbatim as well - same thing.
The bar code says the unit is a dvd640e, Toast sees a dvd640v. Disc info in Toast says it is enabled for DVD+R DL (not the - tho).
I don't generally have trouble with anything hooked to a Mac, but the reference to a blank CD when it is a DVD and the inability to burn DL discs has me searching for why.

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6/25/9:  While this external HP DVD640e burner was listed as a NEW drive - "new" meant never used. A check with HP techs told me the unit was a 2005 factory closeout and the dual layer disc required for it is a 2.4 speed disc. I bought a 2.4 speed DL disc and it works perfect in it.  As far as seeing a CD when a DVD was installed is presumed also the fault of having the wrong speed disc in it (that lot of Memorex DL discs I am also having trouble with elsewhere too). Double-checking my profiler, it does give speed as 2.4x as the burner's profile. Alas, the problem was my newness to the DVD technology. A slap to the forehead and move on.

Posted on Jun 25, 2009

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What kind of blank DVDs do I use to copy an old VHS video tape to the DVD? I have the Sony RDR-VX530. When I put a DVD in, I get an Error message saying that I have the wrong DVD.


According to page 30 of the operation manual, the following information may help;

DISCS THAT CAN BE USED IN THIS RECORDER:

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A free pdf copy of the manual for this model can be downloaded online.

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From your Desktop:

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