Science Fair Project Encyclopedia
Double density
Double Density usually refers to a physical format in a magnetic storage system that uses twice as many bits per length unit as the basic format.
In 3.5" Floppy disks double density marks a disk format that uses 9 sectors of 512 bytes per track, For a total capacity of 720kB in a two-sided 80 track floppy disk.
Currently (2003) used 3.5" floppy disks are high density , which doubles the capacity and bit density of double density.
The term double density can also be applied to magnetic tapes.
Last updated: 10-12-2005 16:56:36
03-10-2013 05:06:04
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details