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can not burn cd next time

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can not burn cd next time

Postby bkrushna on Fri Apr 04, 2003 2:23 am

Hi Guys,
I am writing applications which will write single file to cd everytime. But after first time when i try to write it for second time i am not able to do it? can anybody tell me what is problem ? or is there any thing need to do more.?
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Postby cfitz on Fri Apr 04, 2003 2:52 am

Can you give more details as to what you are trying to do? It isn't clear from your post.

If you are trying to write to a single disc multiple times at different times, then you have only two choices: multi-session or packet writing. Multi-session writing allows you to write more than one session to an ISO 9660 data disc. It is generally more reliable than packet writing, and it creates discs that are readable in most all modern drives and operating systems. However, it might not be suitable for your application if you are writing only one file at a time and those files are small. Why? Because every session you write uses up about 15 MiBytes of the CD for session overhead.

Packet writing uses a special format that allows small files to be written efficiently, and makes the CD behave much like a large floppy disc. Unfortunately, packet writing tends to be less reliable, and data loss is a possibility. Also, packet written discs are not readable in some OS's without installing special reading software. In addition, the formatting required to support packet writing eats up a fair amount of the capacity of the CD. For example, a 74-minute disc's data capacity is reduced to from 650 to 550 MiBytes. Finally, Ahead's packet writing software only works with CD-RW discs (although Roxio's Direct CD works with CD-R as well as CD-RW).

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Postby Wedge Maniac on Fri Apr 04, 2003 11:47 am


cfitz is spot on with his explanation. Personally, I would create a *multisession* cd for doing what you are attempting to do. It's easy and if you are unsure how to do this then post back and we will help.

Of course, you could go with *packet writing* but be forewarned with cfitz's explanation. They can be problematic and unreliable, and definitely not the right choice if you will be inserting the cd in several different computers because each computer will have to install a small program that ensures the cd can be read.
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