question about CD-R Media

[silencer534]

i bought some TDK 40x media today, but my burner writes it at 48x, how is this possible?

 

[Viper96720]

You could buy 6x media and your burner may burn at 48x. Might be a coaster but it'll still burn. The rating just means the manufacturer tested it at that speed. If you got a 48x burner it'll burn the cd at that speed or whatever speed you set. I don't think there is anything on the cd the burner detects that tells it the cd is rated for 40x burning.

 

[Drewpy]

Actually this is not usually possible. When you burn a cd, it gets done in a few phases. Each phase is done at increasing speed. At the start of each phase your burner does a write test to test if the media is capable of being written to at the particular speed.

(purely imaginary example of burning at 36x)
you might only burn the first third of the cd at 12x, the second third at 24x, and the last third at 36x.

if your media is only capable of 20x recording, the second and third recodring phases will be be done at 20x. Not the 24x and 36x you would have if you had the proper media.

some newer burning progs test (or read a special section of it.... I forget which) the media when you insert it, and limit your selections for burning speeds

basically the whole point of this post is that you get what you pay for.

Cheapo media will give you a lot of coasters, and it'll take longer to churn them out.

 

[silencer534]

heres what CD speed said

Pic

 

[silencer534]

how can you tell if the cd you burned is a coaster? cause all the cd's ive burned ive gotten no errors..

 

[McCarthy]

Run verify after burning. If it passes, great, burn lots at a high speed.

 

[Codewiz]

Run scandisc from inside CD Speed. It will do a surface scan for errors. If you have no errors then you are in good shape.

 

[sean2002]

Your TDK media is made by Ritek which now has one of if not the best CDR's now, unlike their sub 16X CDR crap.

 

[techwanabe]

Originally posted by: Drewpy
Actually this is not usually possible. When you burn a cd, it gets done in a few phases. Each phase is done at increasing speed. At the start of each phase your burner does a write test to test if the media is capable of being written to at the particular speed.

(purely imaginary example of burning at 36x)
you might only burn the first third of the cd at 12x, the second third at 24x, and the last third at 36x.

Is that why I tend to get glitches and other problems it the latter part of MUSIC CD's that I burn? I've been taking to burning music CD's and some of my slower settings because this happens often. I've got a 32X LiteON at the office and a 16X Liteon burner at home. Even at the slowest speed at work (8X) it still had problems with a certain music CD... but they were worse at higher speeds. I haven't tried different brands and qualities of media yet to see how that factors in.

 

[sean2002]

Originally posted by: Drewpy
Actually this is not usually possible. When you burn a cd, it gets done in a few phases. Each phase is done at increasing speed. At the start of each phase your burner does a write test to test if the media is capable of being written to at the particular speed.

(purely imaginary example of burning at 36x)
you might only burn the first third of the cd at 12x, the second third at 24x, and the last third at 36x.

if your media is only capable of 20x recording, the second and third recodring phases will be be done at 20x. Not the 24x and 36x you would have if you had the proper media.

some newer burning progs test (or read a special section of it.... I forget which) the media when you insert it, and limit your selections for burning speeds

basically the whole point of this post is that you get what you pay for.

Cheapo media will give you a lot of coasters, and it'll take longer to churn them out.

Sorry but your wrong, his drive is a CAV drive in which the write speed increases over the entire burn process.

 

[Mark R]

if your media is only capable of 20x recording, the second and third recodring phases will be be done at 20x. Not the 24x and 36x you would have if you had the proper media.

A CD-R disc does not know what its maximum speed is. There is no way for the burner to find out what speed the media is rated at.

When you burn a disc, it will be be recorded at whatever speed is selected by the writer and recording software - speeds faster than 24x are usually recorded more slowly at the start, and work their way up to max speed during the burn - exactly how this happens depends on the drive. Some do it in phases, some smoothly increase as the burn proceeds, some use a combination.

I've got some old 2x CD-R discs, which I burned at 32x, they burned fine, but you couldn't read them afterwards (at least, not very well).

Some drives will actually burn a small area of the disc for a dummy run, if the recording quality is low, then it will automatically select a lower speed. (This is a feature of the drive, not the software).

 

[smp]

Originally posted by: techwanabe

Originally posted by: Drewpy Actually this is not usually possible. When you burn a cd, it gets done in a few phases. Each phase is done at increasing speed. At the start of each phase your burner does a write test to test if the media is capable of being written to at the particular speed. (purely imaginary example of burning at 36x) you might only burn the first third of the cd at 12x, the second third at 24x, and the last third at 36x.

Is that why I tend to get glitches and other problems it the latter part of MUSIC CD's that I burn? I've been taking to burning music CD's and some of my slower settings because this happens often. I've got a 32X LiteON at the office and a 16X Liteon burner at home. Even at the slowest speed at work (8X) it still had problems with a certain music CD... but they were worse at higher speeds. I haven't tried different brands and qualities of media yet to see how that factors in.

It might not be the burning part of the process that is to blame. How are you extracting the audio? Or are you burning from MP3? If you are just copying CD's directly then that's probably where the problem lies (especially if your CD reader and your CD writer are slave and master on the same IDE connector) .. If you want to make good copies of CD's you should rip them to your hard drive first using EAC and then burn those ripped .wavs over to your CD. I have heard though, that liteon drives are prone to C2 errors... but I'm not really sure what that means, except to say that they're not as good as plextors.... or so I've been told. My next burner is probably gonna be a liteon though

 

[Drewpy]

Originally posted by: Mark R

if your media is only capable of 20x recording, the second and third recodring phases will be be done at 20x. Not the 24x and 36x you would have if you had the proper media.

A CD-R disc does not know what its maximum speed is. There is no way for the burner to find out what speed the media is rated at.

When you burn a disc, it will be be recorded at whatever speed is selected by the writer and recording software - speeds faster than 24x are usually recorded more slowly at the start, and work their way up to max speed during the burn - exactly how this happens depends on the drive. Some do it in phases, some smoothly increase as the burn proceeds, some use a combination.

I've got some old 2x CD-R discs, which I burned at 32x, they burned fine, but you couldn't read them afterwards (at least, not very well).

Some drives will actually burn a small area of the disc for a dummy run, if the recording quality is low, then it will automatically select a lower speed. (This is a feature of the drive, not the software).

Article at Toms hardware stating that some drives read a section of the cd containing manufacturer and media information (its in the bottom paragraph after the image) This is why with slower media, the higher burn speed options may be disabled.

not applicable to all drives or all burning programs.

 

[bjc112]

Originally posted by: Mark R

if your media is only capable of 20x recording, the second and third recodring phases will be be done at 20x. Not the 24x and 36x you would have if you had the proper media.

A CD-R disc does not know what its maximum speed is. There is no way for the burner to find out what speed the media is rated at.

When you burn a disc, it will be be recorded at whatever speed is selected by the writer and recording software - speeds faster than 24x are usually recorded more slowly at the start, and work their way up to max speed during the burn - exactly how this happens depends on the drive. Some do it in phases, some smoothly increase as the burn proceeds, some use a combination.

I've got some old 2x CD-R discs, which I burned at 32x, they burned fine, but you couldn't read them afterwards (at least, not very well).

Some drives will actually burn a small area of the disc for a dummy run, if the recording quality is low, then it will automatically select a lower speed. (This is a feature of the drive, not the software).

That is incorrect... The new Lite-On drives use Smart- Burn tech.

They tell what the CD is rated at, and will burn at the "safest" speed.....

 

[Drewpy]

Within Nero CD Speed.

Under the "Extra" menu select the "Overburning test..." option.

If you have blank media in the drive it will display the manufacturer info and some other information, including the dye type, which in turn determines the max write speed.

 

[silencer534]

Originally posted by: McCarthy
Run verify after burning. If it passes, great, burn lots at a high speed.

you can only do that when writing data disks

 

[silencer534]

just did that scan, and got like a 2 percent error

 

[Mark R]

The new Lite-On drives use Smart- Burn tech.

They tell what the CD is rated at, and will burn at the "safest" speed.....

No, they don't find out what speed the CD is rated at - they drives are pre-programmed with the rated speeds for several popular discs, but for the rest, there is no way to tell the maximum speed, and so the drive will burn at whatever rate you tell it to. I burned my 2x CDRs at 32x with a lite-on drive, with smartburn enabled. It didn't produce any errors, or slow the burn down, nor did it produce a usable disc.

Smartburn does one more thing; for very poor quality discs, where it spots that the recording is of poor quality, it can reduce the speed - but even with terrible discs, I've never managed to get my drive to do this.

 

[aka1nas]

Another tip I have heard for burning music CDs,.: try both burning and ripping them at a slower speed. I read somewhere(Toms?) that errors increase as you get closer to the edge of the CD and at higher speeds may be enough to throw of a audio CD player(though a computer CD-ROM drive may be able to use error correction and still read the CD)