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TechTalk: Hardware Storage
CDs were
invented in 1997. The "RW" in CD-RW means you can read and write to
the disk many, many times. A CD-RW holds
650 to 700 MB of data. That means a CD-RW is the equivalent of about
520 floppy disks. This is an
optical format, not magnetic like floppies, tapes, and Zip drives.
The data is "burned" into the recording layer with a laser beam.
There are
a variety of software programs for creating disks. The burning
software formats the blank CD, creates a data image of everything
you selected for backup, copies and verifies the data copy. CDs are
used for data archives and transfers. They have enough capacity to
be useful. However, burning a CD is time-consuming. CDs are not the
best method for saving small, incremental changes.
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