Burner shadows!?

[TattooWheels]

Hello.

I have a Pioneer A06.

When i burn a dvd i get a dark area on back side of the disc, it looks like a circular shape, in the middle of the writeable area. The burn process doesnt indicate that anytjing has gone wrong, but it lookes really wierd.

The thing i want to know is if anyone else have experienced this "thing" and maybee anyone know what couses it and if its going to corrupt my discs! ???

The media i've had this happend to is, Princo 4x, SW 4x, Maxell 4x, all dvd-r discs.

[Craig Tucker]

It's supposed to look like that, that is the area of the disc that has data burned to it. If you look at CDRs the same happens with them, its just more noticable with DVD's

[TattooWheels]

Are u shure about that? that would meen that only 10% of data is written, and only in the middle (not start, not the end) of the disc... That would be impossible...

[TattooWheels]

Just something I need to make clear, it is not the "standard" darkening of the disc, when it just changes a little bit, this is black/grey, going to upload a picture so u can see fopr your selfs.

[TattooWheels]

The img.

[mats.hogberg]

Can't see a thing (besides that it's a CD/DVD).
But I experienced something similar yesterday, when I burned an image.
About 1 cm from the centre, a 0.5 mm wide dark ring was visible, just like if the laser had been turned off there for a while. Not unexpected, the video froze at 22 minutes - I guess that's where the "unburned" area started. I'll write it down to media failure, but the burning went fine (DVD Decrypter) and I haven't burned that many DVD yet (bought the burner a week ago...)

/Mats

/Mats

[tompika]

Can't see a thing (besides that it's a CD/DVD).

Take off the helmet Darth Vader , its there in the middle.

[mats.hogberg]

Oh, Hard to see, the rings are, here at the Dark Side Looks like what I got, but the ring I got was much thinner, and closer to the center. The effect is the same I guess - a coaster.
Until further evidence is present, it's a bad disc to me.

/Mats

[widemouth]

Yep, seen that before , That particuar part of the disk is faulty. You may have had no errors when burning but did you do a verify after?

Coaster Man!!!!!

[mats.hogberg]

did you do a verify

Verif...What?

/Mats

[jeremyp969]

The reason for the circles is the way it burns the disk. It needs to spin the disk at varying speeds, because in order to burn at 4x, it needs to spin the inside of the disk a lot faster than it would when burning the outside (C=pi*d). What some drives do is break the disk up into sections, and it will spin the disk at a fast speed for the first say 5 minutes of burning, then it will stop burning, slow the disk down and then start again, and do this even up to 5 or 10 times while burning. This is where you see the different rings around the disc.

[ckdexterhn1]

When i burn a dvd i get a dark area on back side of the disc, it looks like a circular shape, in the middle of the writeable area. The burn process doesnt indicate that anytjing has gone wrong, but it lookes really wierd.

I think I know what you are talking about. It is a thin line darker area within the burned part of the disc, sort of like a crescent. The burn area should be the same color thru-out. That crescent indicates a bad burn. Although it may play fine on the burner and some players, on other players the picture will break up or stop all together when it gets to that part of the disc.

I would use Nero CD Speed to check the disc for errors, and if there are problems, to re-burn the disc or different media or at a slower speed.

[gwhughs]

What you are seeing is a minor seperation in the manufacturing and fusing process of between the media and the polycarbonate plastic when they are pressed together. You will likely not encounter reading or writing errors, however the disk life is dramatically shorter as oxidation take place within the actual media. If the seperation is large enough, it can result in a bad disk and unwritable.