Weird X marks on dvd disc

I’m not sure which subforum to post this…but here it is.

Recently, I have been scanning my dvdr discs, checking how much they’ve degraded. I have alot of those cheap ‘brandless’ discs.

I’ve spotted this disc by chance with lots of X marks all over the disc. It is not visible normally unless under close inspection with a bright light source. None of my other discs have these kind of marks. Is this some sort of fungus by any chance ? Or is it a result of my dvd burner ? Anyone have any idea ?

The reflection in the disc is my webcam… The disc reads pretty fine, no PO failures, but lots of PI failures though. Given this is cheap brandless media, this is alright. But the X marks just intrigues me…

I cant see what you mean buy x-marks but looking carefully at both pictures your disks look scratched and very dusty, concentrating a little more there are also some marks which you normally get when you have burned a disk which is dusty or dirty

Looks like scratches. Nasty little ones too that you can get from not storing them very well.

I guess its really hard to spot it. Taking image of those marks prove to be quite hard due to the reflection of the dvdr discs.


I hope its more visible now. I’ve discovered another disc with those marks, but not all discs from the same batch of cheap ‘brandless’ discs have it…

Those marks don’t seem to be on the disc surface.

[QUOTE=euforia;2024842]I guess its really hard to spot it. Taking image of those marks prove to be quite hard due to the reflection of the dvdr discs.


I hope its more visible now. I’ve discovered another disc with those marks, but not all discs from the same batch of cheap ‘brandless’ discs have it…

Those marks don’t seem to be on the disc surface.[/QUOTE]

Those marks are probably manufacturing flaws in dye or reflection layer.
BTW: what is the MID of those discs? Infodisc or Optodisc?

OPTODISCR008.

Oh, great. I was worrying that these marks are ‘contagious’ as I keep my discs in their cakeboxes. If it spreads it’ll be bad…

I didn’t notice these marks until recently. The dvdr discs are almost 2 years old. Now I’ve switched brands.

I can see what you mean now.

Looks like dye defects or crappy burn strategy.

Upon further inspection, it seems like those X marks didn’t appear in the unused part of the disc. It could be that it only shows up when the burnt.

The only burner I have 2 years ago is the benq dw1640, which I’m still using now.
Trusty ol’ drive. :slight_smile:

Blame the media… I suppose. (They sure look like images of X chromosomes from encylopaedias. I really suspected it was some organic thing since it comes in different sizes. lol)

[QUOTE=euforia;2024907](They sure look like images of X chromosomes from encylopaedias. I really suspected it was some organic thing since it comes in different sizes. lol)[/QUOTE]

Yeah, they remids me chromosomes too :stuck_out_tongue:
Maybe your media are transforming into the live organisms :confused: :bigsmile:

Ah i see what you mean now new pics are much clearer, very weird its little X shapes.

If it wasnt for the clear X shaping to the marks i would had said dust or dirt on the disk before you burned them, the effect is very similar.

Were the disk perhaps stored in a textured cd sleeve or similar before you burned them??? Possibly moisture from the sleeve left a textured unseen pattern on the disk bottom and when burned that is the result… (would also make sense as it seems to be from the mid point to the outter edge which has the issue from the pics and the inner seems fine)

Other than that and perhaps defective media/bad burn like others have said i have no idea what could have caused that.

Consider the possibility of physical contact between something in your burner and the disc, making these strange X shapes. I had something like that happen to me several years ago with an NEC ND-2500, which I blamed on a still unexplained intermittant contact between the lense and disc during overspeed burning while multitasking.

Try running a fingernail over some of those X’s to determine if it is a surface scratch or a pattern in the dye layer…

This is media related. :wink:

[I]Guessing.[/I] Can be (air)bubbles from time when disc parts were bonded to each other.
For sure not a mechanical damage during burning. :rolleyes:

Are you sure you are not burning [B]porn[/B] on these discs ?! :bigsmile:

[QUOTE=minaelromany;2025321]Are you sure you are not burning [B]porn[/B] on these discs ?! :bigsmile:[/QUOTE]

Best explanation so far… :bigsmile:

[QUOTE=minaelromany;2025321]Are you sure you are not burning [B]porn[/B] on these discs ?! :bigsmile:[/QUOTE]

LOOOOOOOL

X marks the spot, do some digging, you might be rich LOL.

Those X’s reminded me some Errors or Bad Sectors on HDD lol.

[QUOTE=minaelromany;2025321]Are you sure you are not burning [B]porn[/B] on these discs ?! :bigsmile:[/QUOTE]

LOL! The truth has finally been uncovered :iagree:

[QUOTE=CAKEY;2025227]Ah i see what you mean now new pics are much clearer, very weird its little X shapes.

If it wasnt for the clear X shaping to the marks i would had said dust or dirt on the disk before you burned them, the effect is very similar.

Were the disk perhaps stored in a textured cd sleeve or similar before you burned them??? Possibly moisture from the sleeve left a textured unseen pattern on the disk bottom and when burned that is the result… (would also make sense as it seems to be from the mid point to the outter edge which has the issue from the pics and the inner seems fine)

Other than that and perhaps defective media/bad burn like others have said i have no idea what could have caused that.[/QUOTE]

i believe the X’s are in the dye layer… since they won’t show up unless you view it from a certain angle with some light reflection. I didn’t store in sleeves, only in their original cakeboxes, since its more of a long term backup kind of thing.

Hm… My perverted burner…

I swear I didn’t burn porn. My burner did.

[QUOTE=euforia;2025723]i believe the X’s are in the dye layer… since they won’t show up unless you view it from a certain angle with some light reflection. I didn’t store in sleeves, only in their original cakeboxes, since its more of a long term backup kind of thing.

Hm… My perverted burner…[/QUOTE]

In my experience marks like that are almost always down to something being in contact with the disk when its burned, (leave a disk out to get covered in a SMALL amount of dust and burn it and you will see what i mean) tiny marks are indeed hard to spot until you angle the disk in light.

I had a similar issue with a couple of disks a year or so ago, except instead of a “X” pattern i ended up more with “#” marks all over the burned area, turns out after a heck of a lot of investigating it was down to a few plastic wallets i had stored the disks in. The textured plastic had either scratched or left dust/dirt makes on the disk which were not noticed prior to burning and the funny marks were the result. I have also heard of similar issues occuring to people that store NON-burned disks in those plastic wallets with a cloth divider in them.

However my issue was not anywhere near as bad as yours, i would have perhaps a dozen at the very most marks, your disks seem practically covered, so i spose it could also be the dye on the disk itself breaking down… was the media concerned cheapo rubbish, or known to be decent?

Finally id say alter the method of storage you are using, disk tubs are normally fine, but if you are regularly taking several disks out and putting them back its not unusual for non-used disks to get covered in dust or scratched.