Non-burned-looking patches on CD

I recently got a Norcent DW412 cd/dvd burner. I burned only about a
hundred discs with it (cd only), when it started producing discs with
visible anomolies. The burned area of the discs contain patches which
are of the same complexion as the virgin non-burned area. So far, the
audio discs containing these patches play ok and the data discs don't
appear to be corrupt, but I assume they will have reduced longevity
and I'm worried that it will eventually start producing coasters.

I've tried blanks from the same spindle in two other CD burners, and
they come out fine. These patches tend to occur near the outer area of
the burned portion of the disc, and they tend to get larger and more
numerous the more I use the burner without a break (for example, in my
last session, my first disc looked ok, the second one had a small
patch, and the third one had three patches). Any advice is
appreciated.

Could this be due to the burning slowing down because of the burn proof
option??


Sean wrote in message
m...
I recently got a Norcent DW412 cd/dvd burner. I burned only about a
hundred discs with it (cd only), when it started producing discs with
visible anomolies. The burned area of the discs contain patches which
are of the same complexion as the virgin non-burned area. So far, the
audio discs containing these patches play ok and the data discs don't
appear to be corrupt, but I assume they will have reduced longevity
and I'm worried that it will eventually start producing coasters.

I've tried blanks from the same spindle in two other CD burners, and
they come out fine. These patches tend to occur near the outer area of
the burned portion of the disc, and they tend to get larger and more
numerous the more I use the burner without a break (for example, in my
last session, my first disc looked ok, the second one had a small
patch, and the third one had three patches). Any advice is
appreciated.

sounds like faulty CDRs


"Sean" wrote in message
m...
I recently got a Norcent DW412 cd/dvd burner. I burned only about a
hundred discs with it (cd only), when it started producing discs with
visible anomolies. The burned area of the discs contain patches which
are of the same complexion as the virgin non-burned area. So far, the
audio discs containing these patches play ok and the data discs don't
appear to be corrupt, but I assume they will have reduced longevity
and I'm worried that it will eventually start producing coasters.

I've tried blanks from the same spindle in two other CD burners, and
they come out fine. These patches tend to occur near the outer area of
the burned portion of the disc, and they tend to get larger and more
numerous the more I use the burner without a break (for example, in my
last session, my first disc looked ok, the second one had a small
patch, and the third one had three patches). Any advice is
appreciated.

Probably neither gents; what OP sees is likely the different speed
'zones' the drive steps through whence you burn faster than 16x. OP
might try a burn *at or under 16x* and observe the visible results...

Tim K

"Dan G" wrote in message
...
sounds like faulty CDRs


"Sean" wrote in message
m...
I recently got a Norcent DW412 cd/dvd burner. I burned only about a
hundred discs with it (cd only), when it started producing discs
with
visible anomolies. The burned area of the discs contain patches
which
are of the same complexion as the virgin non-burned area. So far,
the
audio discs containing these patches play ok and the data discs
don't
appear to be corrupt, but I assume they will have reduced longevity
and I'm worried that it will eventually start producing coasters.

I've tried blanks from the same spindle in two other CD burners, and
they come out fine. These patches tend to occur near the outer area
of
the burned portion of the disc, and they tend to get larger and more
numerous the more I use the burner without a break (for example, in
my
last session, my first disc looked ok, the second one had a small
patch, and the third one had three patches). Any advice is
appreciated.

Ok, I went out and bought a new spindle of CDs (BTW, I only use Fuji
CDs made in Japan, if it matters). I burned four discs from this new
spindle and they turned out looking fine. I can't say that that proves
anything, though, since the problem doesn't turn up until I've burned
at least one or two in a row. Maybe the fifth or sixth one would have
been bad, I dunno (and I've wasted so many damn CDs already, I didn't
want to burn a few more just for the sake of burning).

About the burn-speed-related theory, if I understand correctly,
wouldn't that make the visible anomolies clustered in the inner area,
rather than the outer, as mine are? It burns from the inside out,
right? and I assume it doesn't wait until the burn is almost complete
until it steps through the different speeds.

Just the opposite; you'd notice the different looking areas as you went
outward from center; as the apparent disc rotational speed increases the
further outward you go...

Tim K

"Sean" wrote in message
om...
Ok, I went out and bought a new spindle of CDs (BTW, I only use Fuji
CDs made in Japan, if it matters). I burned four discs from this new
spindle and they turned out looking fine. I can't say that that proves
anything, though, since the problem doesn't turn up until I've burned
at least one or two in a row. Maybe the fifth or sixth one would have
been bad, I dunno (and I've wasted so many damn CDs already, I didn't
want to burn a few more just for the sake of burning).

About the burn-speed-related theory, if I understand correctly,
wouldn't that make the visible anomolies clustered in the inner area,
rather than the outer, as mine are? It burns from the inside out,
right? and I assume it doesn't wait until the burn is almost complete
until it steps through the different speeds.

It seems to me we're saying the same thing. Perhaps I should explain
in less relative terms. These patches are near pretty much along the
edge of the border between the burned and unburned area. Even given
that the burner has to get up to speed and that any effects caused
from shifting gears would not appear immediately in the burn process,
I'm assuming that neither would they appear at near the end of the
process, which is what appears to be happening with my discs. The
amount of data I've been burning is never less than 500 megs, so in
order for the gear-shifting theory to apply to my case, wouldn't that
mean that the burner doesn't get up to full speed until after, as a
guess, 400 megs or so are burned (at any rate it would be past the
halfway point)?

I should also clarify that by "patch", I'm talking about a roughly
square to circular area that ranges in size from the diameter of a
pencil to about half that.


"Tim Kroesen" wrote in message link.net...
Just the opposite; you'd notice the different looking areas as you went
outward from center; as the apparent disc rotational speed increases the
further outward you go...

Tim K

"Sean" wrote in message
om...
Ok, I went out and bought a new spindle of CDs (BTW, I only use Fuji
CDs made in Japan, if it matters). I burned four discs from this new
spindle and they turned out looking fine. I can't say that that proves
anything, though, since the problem doesn't turn up until I've burned
at least one or two in a row. Maybe the fifth or sixth one would have
been bad, I dunno (and I've wasted so many damn CDs already, I didn't
want to burn a few more just for the sake of burning).

About the burn-speed-related theory, if I understand correctly,
wouldn't that make the visible anomolies clustered in the inner area,
rather than the outer, as mine are? It burns from the inside out,
right? and I assume it doesn't wait until the burn is almost complete
until it steps through the different speeds.

Why not just burn a disc under 16x and see if the effect is still there;
you won't waste anything but a little time... and will discover if the
bands are burn speed zone related or not...

Patches that aren't circular would clearly be something else weird;
perhaps bad media... The only similar experience I can relate was the
first burner I ever bought (defective Yammy1116s) that when I attempted
to Format a (cheap Memorex) CDRW for packet writing left a weird
elliptical patch visible on the media that was not concentric, after
running unsuccessfully for several hours. Media or drive??? I didn't
wait long to ponder because the drive wouldn't write to good CDRW and
format in a way that was readable Two days later; back it went! Never
say a weird elliptical mark again...

Tim K

"Sean" wrote in message
om...
It seems to me we're saying the same thing. Perhaps I should explain
in less relative terms. These patches are near pretty much along the
edge of the border between the burned and unburned area. Even given
that the burner has to get up to speed and that any effects caused
from shifting gears would not appear immediately in the burn process,
I'm assuming that neither would they appear at near the end of the
process, which is what appears to be happening with my discs. The
amount of data I've been burning is never less than 500 megs, so in
order for the gear-shifting theory to apply to my case, wouldn't that
mean that the burner doesn't get up to full speed until after, as a
guess, 400 megs or so are burned (at any rate it would be past the
halfway point)?

I should also clarify that by "patch", I'm talking about a roughly
square to circular area that ranges in size from the diameter of a
pencil to about half that.


"Tim Kroesen" wrote in message
link.net...
Just the opposite; you'd notice the different looking areas as you
went
outward from center; as the apparent disc rotational speed increases
the
further outward you go...

Tim K

"Sean" wrote in message
om...
Ok, I went out and bought a new spindle of CDs (BTW, I only use
Fuji
CDs made in Japan, if it matters). I burned four discs from this
new
spindle and they turned out looking fine. I can't say that that
proves
anything, though, since the problem doesn't turn up until I've
burned
at least one or two in a row. Maybe the fifth or sixth one would
have
been bad, I dunno (and I've wasted so many damn CDs already, I
didn't
want to burn a few more just for the sake of burning).

About the burn-speed-related theory, if I understand correctly,
wouldn't that make the visible anomolies clustered in the inner
area,
rather than the outer, as mine are? It burns from the inside out,
right? and I assume it doesn't wait until the burn is almost
complete
until it steps through the different speeds.