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#1
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"Under-Burning" to CD. Is this necessary?
A reply to a readers query in the "Boot Camp" section of Tuesday's Daily
Telegraph suggested that it might be best NOT to fill up a CD-R to its' limit as the reliability of the recording medium is not always uniform and does tend to tail off towards the outer rim of the disc, and that if you're recording to an 80 minute disc blank, play safe and don't try to record more than 72 minutes of music or 630mb of data. This seems a bit over-cautious to me. I've never had any problems writing right up to the capacity of the disc. Anybody found any problems? |
#2
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Mike O'Sullivan wrote:
A reply to a readers query in the "Boot Camp" section of Tuesday's Daily Telegraph suggested that it might be best NOT to fill up a CD-R to its' limit as the reliability of the recording medium is not always uniform and does tend to tail off towards the outer rim of the disc, and that if you're recording to an 80 minute disc blank, play safe and don't try to record more than 72 minutes of music or 630mb of data. This seems a bit over-cautious to me. I've never had any problems writing right up to the capacity of the disc. Anybody found any problems? How important it is depends on how critical the information is to you. Yes, error rate tends to increase toward the outside of a disc. Take an imperfectly written disc and read the error information using your favorited diagnostic program (e.g., CDSpeed). In addition, poor handling is more likely to damage the outer portion than the center. On the other hand, a well written line - one with few or no recoverable errors, let alone unrecoverable ones - can be written to the ATIP limit without trouble. If by "I've never had any problems" you mean that the tracks haven't failed, your criterion is too loose; by the time the track becomes unreadable or noisy, you are far below the quality of write most would consider acceptable. Mike -- http://www.mrichter.com/ |
#3
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Mike O'Sullivan wrote:
A reply to a readers query in the "Boot Camp" section of Tuesday's Daily Telegraph suggested that it might be best NOT to fill up a CD-R to its' limit as the reliability of the recording medium is not always uniform and does tend to tail off towards the outer rim of the disc, and that if you're recording to an 80 minute disc blank, play safe and don't try to record more than 72 minutes of music or 630mb of data. This seems a bit over-cautious to me. I've never had any problems writing right up to the capacity of the disc. Anybody found any problems? How important it is depends on how critical the information is to you. Yes, error rate tends to increase toward the outside of a disc. Take an imperfectly written disc and read the error information using your favorited diagnostic program (e.g., CDSpeed). In addition, poor handling is more likely to damage the outer portion than the center. On the other hand, a well written line - one with few or no recoverable errors, let alone unrecoverable ones - can be written to the ATIP limit without trouble. If by "I've never had any problems" you mean that the tracks haven't failed, your criterion is too loose; by the time the track becomes unreadable or noisy, you are far below the quality of write most would consider acceptable. Mike -- http://www.mrichter.com/ |
#4
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I know that from the Lite-On KProbe scans I've done of discs, I've never
seen any that had any drastic increase in error rate at the end of the disc, unless it's from the disc not being able to handle the peak write speeds at the outside edge. If you overburn the disc past the stated capacity, the error rate may increase once you get past the official end of the disc.. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from Home Page: http://www.roberthancock.com/ "Mike O'Sullivan" wrote in message ... A reply to a readers query in the "Boot Camp" section of Tuesday's Daily Telegraph suggested that it might be best NOT to fill up a CD-R to its' limit as the reliability of the recording medium is not always uniform and does tend to tail off towards the outer rim of the disc, and that if you're recording to an 80 minute disc blank, play safe and don't try to record more than 72 minutes of music or 630mb of data. This seems a bit over-cautious to me. I've never had any problems writing right up to the capacity of the disc. Anybody found any problems? |
#5
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"Mike Richter" wrote in message ... Mike O'Sullivan wrote: A reply to a readers query in the "Boot Camp" section of Tuesday's Daily Telegraph suggested that it might be best NOT to fill up a CD-R to its' limit as the reliability of the recording medium is not always uniform and does tend to tail off towards the outer rim of the disc, and that if you're recording to an 80 minute disc blank, play safe and don't try to record more than 72 minutes of music or 630mb of data. This seems a bit over-cautious to me. I've never had any problems writing right up to the capacity of the disc. Anybody found any problems? How important it is depends on how critical the information is to you. Yes, error rate tends to increase toward the outside of a disc. Take an imperfectly written disc and read the error information using your favorited diagnostic program (e.g., CDSpeed). In addition, poor handling is more likely to damage the outer portion than the center. On the other hand, a well written line - one with few or no recoverable errors, let alone unrecoverable ones - can be written to the ATIP limit without trouble. If by "I've never had any problems" you mean that the tracks haven't failed, your criterion is too loose; by the time the track becomes unreadable or noisy, you are far below the quality of write most would consider acceptable. Thanks. Well basically I mean that the "information", ie music, I've recorded still sounds good. I suppose I'll just have to be careful with handling. |
#6
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On Thu, 25 Sep 2003 06:17:24 +0000 (UTC), "Mike O'Sullivan"
wrote: Thanks. Well basically I mean that the "information", ie music, I've recorded still sounds good. I suppose I'll just have to be careful with handling. We've been discussing disc failures in another thread, and what I've found on my music CDs is that they get progressively harder to read as you get further out on the disc, once the disc starts deteriorating. For instance, the compilation in my Alpine car player now works fine on the first 6 or 7 tracks, and will track all through the disc if I let it play through, but if I try to skip to (say) the 10th track, it takes it 30-40 seconds to pick it up again. The higher the track number, the longer it takes, but once it starts playing, the sound is fine. On my home stereo player, it shows up as more skips on the later tracks, and gets unlistenable on the last third of the disc. I still don't underburn, but I do copy important discs more frequently than I used to. Neil Maxwell - I don't speak for my employer |
#7
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"Neil Maxwell" wrote in message ... On Thu, 25 Sep 2003 06:17:24 +0000 (UTC), "Mike O'Sullivan" wrote: Thanks. Well basically I mean that the "information", ie music, I've recorded still sounds good. I suppose I'll just have to be careful with handling. We've been discussing disc failures in another thread, and what I've found on my music CDs is that they get progressively harder to read as you get further out on the disc, once the disc starts deteriorating. For instance, the compilation in my Alpine car player now works fine on the first 6 or 7 tracks, and will track all through the disc if I let it play through, but if I try to skip to (say) the 10th track, it takes it 30-40 seconds to pick it up again. The higher the track number, the longer it takes, but once it starts playing, the sound is fine. On my home stereo player, it shows up as more skips on the later tracks, and gets unlistenable on the last third of the disc. I still don't underburn, but I do copy important discs more frequently than I used to. Thanks for that. It's usually only wave files from private and BBC broadcasts which I burn up to the max. Maybe I'll start leaving a few minutes free. |
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