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I have a tsstcorp ts-l462d dvd/cdw combo drive factory installed in my compaq presario c501nr notebook. i cannot properly format cdrw media. only 5544mb of 700mb cdrw formatted. i used both STAPLES AND MEMOREX cdrw media. how can i fix and get all 700mb formatted.

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  • finishnow Oct 14, 2008

    correcion to above: only 554mb of 700mb formatted.

  • finishnow Oct 14, 2008

    i have a tsstcorp ts-l462d combo drive factory installed by my oem on my compaq presario c501nr notebook. i have a problem formatting cdrw media. only 554mb of 700mb availabele after formatting. i was told this was due to the creation of file allocation tables.



    however when i format CD-R media i have no such problem. all 700mb are available after formatting. it seems i can use any CD-R manufacturer's media.



    please explain why there is such a difference between formatting cdrw vs, cd-r media.

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You will never be able to format the entire 700MB of any RW media. This is because the formatting requires a file allocation table be created and this takes up a lot of room. The data stored in this table is for addressing file segments by cylinder, track and sector. If you have a floppy disk you will notice on the diskette drawer slide it states it is a 2MB diskette but when formatted you only have 1.44MB of usable addressable space. The same is true for any formatted RW CD.

Just how much space is available after formatting a RW disc on your system depends in part on your software. It is possible to have as much as 645MB of usable space on a RW CD. Every software program is a bit different.

I hope this helps you to understand why you see this downsizing of your RW CD's usable space after formatting.

You can also bypass proprietary software and just use Windows. You paste your files to the CD drive and you'll notice a new top section in the file window pane that is titled "Files Waiting to be Written". You have to right click the right hand side of the Explorer view of your drive and then select the command, "write these files to disk". You'll probably end up with more usable space by letting Windows format it for you in this manner. However, it does depend in part on your drive's maker.

Regards,
Worldvet

Posted on Oct 14, 2008

  • Glenn Rogers
    Glenn Rogers Oct 15, 2008

    Data written to a CD-R is written much like a phonograph record, it is in one contiguous line of data with file header information that states Start of File, End of File and the file name itself inside that header. Because it is written in this manner, without the need for a File Allocation Table you will get nearly all 700MB of space as usable. Note that you will not be able to put 700MB of data on a 700MB disc. You can try this as a little experiment is you want, you just receive another error message as to disc space.

    Another good example of this loss of storage size as advertised is in Hard Drives. A 500GB Hard Drive will not even come anywhere close to the advertised usable space once it is formatted, but when you see your drive in the System, it will be labeled and described as a 500GB drive.

    I do understand this is somewhat bewildering and we computer users, builders and owners have to accept the fact that this is the way it is and move on with the knowledge of what space there is available in spite of labels.

    Some software varies on its approach to reserving file space on a CD-RW. Some reserve more and others less. My suggestion is to use Nero if you can afford it. There are free CD Writing/Formatting software titles out there but some leave a great deal to be desired. As a shopper it is buyer beware. However, the maker of your CD-RW media will have no affect on how much file space is available or not.

    Best Regards,
    Worldvet


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