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Bad Sector Scan
Initialization writes "null" data onto the disc, and then reads the data to verify that it
was written correctly. If the data was stored properly in a particular "sector" of the disc,
then that sector is considered to be functional. However, if what is read back from the
disc is not what was written onto it, then the sector is considered "bad" and is marked
accordingly-or "spared" (and is not used subsequently).
Note
Note that initialization is also a good thing to do periodically to
remove "bad" sectors from use. (But remember to first make a
back-up copy of the information on the disc, since all files will be
overwritten! )
Mass Storage Concepts
3-17
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