How come I can't burn to DVD+R DL?

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I'm trying to backup a copy of leopard I'musing a memorex DVD+R DL but I'm getting disk checksum error on 3 disks in a row.
 
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What? You shouldn't be copying the Leopard DVDs.
 
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As far as I'm aware (at least according to my SPA cert) using a backup copy of media and storing the original is legit. As long as only the original license holder uses it.

There is no encryption, so DMCA would not apply.
 
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Success with burning double-layer and dual-layer disks is somewhat random. Some burners don't like certain media. Finding compatible media for your burner will be a matter of trial and error. If DVD+R disks are giving you trouble, try DVD-R disks instead. Also try switching brands. And, as always, burn at slow speeds.

And by the way, it's legal to make as many back up copies as you want as long as they're only installed on the same machine.
 
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Success with burning double-layer and dual-layer disks is somewhat random. Some burners don't like certain media. Finding compatible media for your burner will be a matter of trial and error. If DVD+R disks are giving you trouble, try DVD-R disks instead. Also try switching brands. And, as always, burn at slow speeds.

And by the way, it's legal to make as many back up copies as you want as long as they're only installed on the same machine.
My experiences with writeable dual-layer DVDs have always been a bit flakey...
None of the three Macbooks we have like to read them (they often spit them out again the first few tries), so I usually end up reading them in my external DVD drive, which reads them fine.

My advice: If you want a backup, create a disk image of your DVD and if you ever need to reinstall Leopard from your backup "disk", just clone the image onto an external harddrive and install it from there. That's what we do at work with OS X developer seeds and it's also a lot quicker than installing from the DVD!
 
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It's legal if you don't install it on another machine and you keep all of the stuff the original disc came with.

I have used Fuji DL discs. I made a copy of Leopard using one of their discs. I have burned maybe 100 DL Fuji discs and never had one go bad. I have never heard one good thing about Memorex DL discs.
 

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