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You are here: MacNN Forums > Software - Troubleshooting and Discussion > Applications > Overburning, Reading CD-R Manufacturer Data, and More

Overburning, Reading CD-R Manufacturer Data, and More
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ghporter
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Apr 28, 2019, 09:32 PM
 
I digitized tapes of my father-in-law reading stories for my then-infant son while we were stationed overseas, and I burned them to a CD. I want to make a copy for my niece, but the original CD comes out to just under 750 MB, and standard CDs are only 700 MB. Even "high capacity" CD-Rs can only report 700 MB/80 minutes capacity because of the limitations of the manufacturer's ATIP data structure.

First, can I configure iTunes to burn a high capacity disc with more than 700 MB (but only 74 minutes) of content? How?

Second, I can't find an app that will simply read the hard-pressed data on a CD-R or finalized CD ROM and report stuff like manufacturer name, stated capacity, and so on. I hope my Google-fu is simply weak right now. If so, suggest me some apps. I want to find out how I got 750 MB of data on a CD some time 15 or so years ago, and if I lucked into a high capacity disc back then, at least I'll know. I'm more inclined to think I simply used a Windows burning program that scoffed at the ATIP data and burned the data to the disc.

Thanks!

Glenn -----OTR/L, MOT, Tx
     
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Apr 29, 2019, 05:26 AM
 
750MB sounds a lot. I know that I have overburned discs, but never that much. Are you sure it isn't about the decimal/binary conversion thing? 700MB on CDs is binary ("real MB") while MacOS these days reports storage as decimal MB ("mini-megs").
The new Mac Pro has up to 30 MB of cache inside the processor itself. That's more than the HD in my first Mac. Somehow I'm still running out of space.
     
ghporter  (op)
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Apr 29, 2019, 08:20 AM
 
Finder reports 774+ MB (775+ on disk),so I think it’s accurate. And the .dmg from the CD is that size as well.

I have to make it an audio CD because of the equipment my sister has to play the disc, otherwise I’d just burn an MP3 disc of the tracks.

The original tracks are in .wav format. Is there a format I can convert these to that will a) take up less space and b) allow me to fit all of the (audio) tracks onto a standard CD?

Glenn -----OTR/L, MOT, Tx
     
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Apr 29, 2019, 10:21 AM
 
No, it has to be .wav for an audio CD. The bitrate etc is also fixed, and there isn't even a mono option to double the running time.

Looking this up, there is something called "high capacity recordable CD" that increases the stored data to 90 or 99 minutes. Is it possible that you got a disc like that? I never heard of this until reading it on Wikipedia just now, but I suppose to must have existed.
The new Mac Pro has up to 30 MB of cache inside the processor itself. That's more than the HD in my first Mac. Somehow I'm still running out of space.
     
ghporter  (op)
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Apr 29, 2019, 10:37 AM
 
While it’s possible I started with a high capacity disc, that’s the reason for the second part of my question. A finalized CD just looks like CD ROM unless you can read - and make sense of - the manufacturer’s data.

Glenn -----OTR/L, MOT, Tx
     
ghporter  (op)
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Apr 29, 2019, 12:42 PM
 
The disc is an 80 min/700 MB Prime Peripherals disc. I converted the cassette tapes to WAV in December 2000 and January 2001, and I used Windows 98, both to convert the cassette audio to WAV and to burn the CD.

I think one issue I've had is that copying the contents to disk has meant the different tracks are saved as separate files. I'm going to try to copy the whole thing as a "DVD/CD Master" image, and see if that makes it smaller.

Glenn -----OTR/L, MOT, Tx
     
reader50
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Apr 29, 2019, 12:45 PM
 
Mount the mystery CD. Open System Information.

Check under:
(if internal optical) SATA -> (controller channel) -> optical drive -> your CD -> the mounted volume
(if external optical) USB -> optical drive -> your CD -> the mounted volume

The your CD section just might give you what you want.
     
ghporter  (op)
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Apr 29, 2019, 01:48 PM
 
Good call, reader. I’ll check that in a bit.

Glenn -----OTR/L, MOT, Tx
     
ghporter  (op)
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Apr 29, 2019, 02:50 PM
 
Here's the problem, I think. The 15 tracks read as 15 separate volumes, with their associated overhead.
Volumes:
disk2s1:
Capacity: 77.9 MB (77,862,960 bytes)
Media Type: CD-ROM
BSD Name: disk2s1
Content: CD_DA
disk2s2:
Capacity: 51.4 MB (51,353,568 bytes)
Media Type: CD-ROM
BSD Name: disk2s2
Content: CD_DA
disk2s3:
Capacity: 62.8 MB (62,791,344 bytes)
Media Type: CD-ROM
BSD Name: disk2s3
Content: CD_DA
disk2s4:
Capacity: 21.3 MB (21,259,728 bytes)
Media Type: CD-ROM
BSD Name: disk2s4
Content: CD_DA
disk2s5:
Capacity: 129.1 MB (129,096,576 bytes)
Media Type: CD-ROM
BSD Name: disk2s5
Content: CD_DA
disk2s6:
Capacity: 56.4 MB (56,433,888 bytes)
Media Type: CD-ROM
BSD Name: disk2s6
Content: CD_DA
disk2s7:
Capacity: 46.3 MB (46,266,192 bytes)
Media Type: CD-ROM
BSD Name: disk2s7
Content: CD_DA
disk2s8:
Capacity: 28.1 MB (28,106,400 bytes)
Media Type: CD-ROM
BSD Name: disk2s8
Content: CD_DA
disk2s9:
Capacity: 57.9 MB (57,875,664 bytes)
Media Type: CD-ROM
BSD Name: disk2s9
Content: CD_DA
disk2s10:
Capacity: 94.2 MB (94,239,936 bytes)
Media Type: CD-ROM
BSD Name: disk2s10
Content: CD_DA
disk2s11:
Capacity: 17 MB (17,042,592 bytes)
Media Type: CD-ROM
BSD Name: disk2s11
Content: CD_DA
disk2s12:
Capacity: 24.3 MB (24,326,736 bytes)
Media Type: CD-ROM
BSD Name: disk2s12
Content: CD_DA
disk2s13:
Capacity: 61.2 MB (61,163,760 bytes)
Media Type: CD-ROM
BSD Name: disk2s13
Content: CD_DA
disk2s14:
Capacity: 18.9 MB (18,895,968 bytes)
Media Type: CD-ROM
BSD Name: disk2s14
Content: CD_DA
disk2s15:
Capacity: 27.7 MB (27,685,392 bytes)
Media Type: CD-ROM
BSD Name: disk2s15
Content: CD_DA

Glenn -----OTR/L, MOT, Tx
     
ghporter  (op)
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Apr 29, 2019, 04:31 PM
 
In a flash of enlightenment, I decided to simply burn two discs, with half of the stories on each disc. DUH!

That still leaves unanswered how I got more than the capacity of the CD onto that CD...

Glenn -----OTR/L, MOT, Tx
     
   
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