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meatwork

Erase DVD9

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I have some DVD+R DL 8.5GB discs which were written to from a 4GB ISO file. (on different pcs and win xp and 7)

When try erase them says Present is "Not re-writable (DVD+R Dual Layer)" (on different pcs and win xp and 7)

Drive 1: PIONEER DVD-RW DVR-109

Drive 2:HL-DT-ST DVDRAM GMA-4082N

Drive 3:HL-DT-ST DVD+RW GH70N

Discs say used space is 4.07GB, Free 0

Discs were written with both Drives 1 and 3.

None of drives can erase.

Is there any way ti erase them ?

TIA.

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then sort of logo with:

RW

DVD+R DL

That is conflicting. Either it is R or it is RW, but it can't be both. Since CDBXP says "DVD+R" it is most likely that you cannot erase the disc.

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Nope, that is not erasable. Don't know why they put an RW logo bottom right, but in this case I'd say the large letters can be prioritised.

I actually think there are no RW DL media at all, at least I can't find any on Amazon.

Quote wikipedia:

Dual layer

A dual-layer DVD+RW specification was approved in March 2006 with a capacity of 8.5 GB.[2] However, manufacturing support for rewritable dual-layer discs did not materialize due to cost and expected competition from newer formats such as Blu-ray, which provides up to 25 GB on a single layer.

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