Size vs. Size on Disk?

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  • Chen
    Senior Member
    • Jun 2001
    • 8388

    Size vs. Size on Disk?

    What's the difference between these? I have a folder, which I want to burn to a CD, whose size is 500MB but size on disk is 1GB... so will I be able to burn it on a 700MB media or not?
    Chen Avinadav
    Better to remain silent and be thought a fool than to speak out and remove all doubt.

    גם אני מאוכזב מסיקור תחרות לתור מוטור של NRG הרשת ע"י מעריב
  • George L
    Former vBulletin Support
    • May 2000
    • 32996
    • 3.8.x

    #2
    Originally posted by Chen
    What's the difference between these? I have a folder, which I want to burn to a CD, whose size is 500MB but size on disk is 1GB... so will I be able to burn it on a 700MB media or not?
    hit your question mark and tap size on disk label and you'll see for size on disk
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    • Chen
      Senior Member
      • Jun 2001
      • 8388

      #3
      So it's really 500MB? And if I run defragmentation the side on disk will decrease?
      Chen Avinadav
      Better to remain silent and be thought a fool than to speak out and remove all doubt.

      גם אני מאוכזב מסיקור תחרות לתור מוטור של NRG הרשת ע"י מעריב

      Comment

      • Kier
        Former Lead Developer, vBulletin
        • Sep 2000
        • 8179

        #4
        Nope, the inflated number for 'size on disk' is due to the way that operating systems store files. For example, on a particular file system files may have to be stored in 32KB blocks - this would mean that a 0.5KB file would actually take 32KB on disk and a 33KB file would actually take 64KB on disk. It's not related to fragmentation - so a defrag won't change the size on disk.

        Geddit?

        Comment

        • filburt1
          Senior Member
          • Feb 2002
          • 6606

          #5
          Extending on what Kier said, you can make it smaller by using FAT32/NTFS or another file system that uses a smaller cluster size. IIRC FAT32 uses 4 KB clusters and NTFS's can vary automatically.
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          • Chen
            Senior Member
            • Jun 2001
            • 8388

            #6
            I already use NTFS. Anyway, thanks for the help. I burnt the whole folder and eventually it took about 550MB.
            Chen Avinadav
            Better to remain silent and be thought a fool than to speak out and remove all doubt.

            גם אני מאוכזב מסיקור תחרות לתור מוטור של NRG הרשת ע"י מעריב

            Comment

            • Jake Bunce
              Senior Member
              • Dec 2000
              • 46598
              • 3.6.x

              #7
              If the folder is full of small files, you can reduce its "size on disk" for burning by zipping it. Then you get compression in addition to the smaller size overhead of one file.

              Comment

              • Raz Meister
                Senior Member
                • Jun 2001
                • 1148

                #8
                There are negative sides to this aswell, as it would increase the size of your indexes.
                Raz - KMC Forums

                Comment

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