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Floppy Compression

Posted on 2003-11-19
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Last Modified: 2013-12-28
I saved five files onto a compressed floppy which increased the capacity from 1.38MB to 2.56MB. After I saved each file I went to My Computer>Properties to check the free space. I found that after each file was saved, the capacity diminished each time until the disk was almost full (it wouldn't take another file) and the capacity was just 1.56MB. At that point I had lost 1.0MB of capacity into "thin air". I never had this problem before when saving to a compressed disk.
I then copied the same files onto a another disk with 1.38MB capacity and actually got one more file onto it than I got on the "compressed" disk.
What caused this and what can be done to correct the problem?
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Question by:frankoravec
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7 Comments
 
LVL 65

Expert Comment

by:SheharyaarSaahil
ID: 9784349
better to move this question to STORAGE section :)
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Expert Comment

by:BillDL
ID: 9784908
Was the floppy formatted using the Quick Format command before using DriveSpace3 on it, or did you use the FULL format option?

I don't suppose they could have been .jpg images by any chance?  They already use a compression algorithm and attempting to compress them when added to an already compressed drive can occasionally increase their file size while on there.

Another factor will be seen if you right-click on your floppy drive > "compression" tab > "run agent" button > "settings" > exceptions.

Are any of the file types set as exceptions and therefore NOT being compressed?
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Expert Comment

by:BillDL
ID: 9784926
Rather than going into "My Computer" to check the "free space", have you actually run Drivespace3 from the "advanced" button, in the dialogue accessed above, and looked at the options for adjusting compression ratios, and adjusting free space between the host drive and the floppy?

The drive has to be "mounted" so that the compression driver can use it as intended.

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by:LucF
ID: 9785510
What kind of files where you trying to write to the disk? If these where allready compressed files this may be the cause.
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by:frankoravec
ID: 9789448
The floppys that I have been using are pre-formatted (IBM format) and I have had no problems, as mentioned previously. I am saving monthly statements (no images) in PDF (which I hate). Almost every time I use PDF my PC goes crazy.
I will address the other comments later. Must go. Thanks.

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LucF earned 500 total points
ID: 9789503
> PDF => this is also a highly compressed item.
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by:LucF
ID: 9790449
Glad to help
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