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ZERODISK.DOC
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1989-03-07
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zerodisk(1)
NAME
zerodisk - erase unallocated disk blocks
SYNTAX
zerodisk [device]
DESCRIPTION
The zerodisk command is used to erase those blocks of disk space
which are presently unused, but may still contain information from
removed files. If a device name is given, that device's unused blocks
are zeroed, otherwise the device containing the current directory is
zeroed. Any existing files are left untouched.
Possible reasons for using zerodisk are to protect outdated but
sensitive data, or to make it easier to track down lost disk blocks
if some future need should arise.
Zerodisk should be very safe to use, as it works by simply writing
zeroes to a temporary file until there is no more space left on the
given device, and the operating system is not bypassed.
EXAMPLES
zerodisk a:
zerodisk c:/tmp/
zerodisk /tmp/
FILES
[device]zerodisk.tmp - temporary file created on given device.
AUTHOR
Steve Creps, Indiana University (creps@silver.bacs.indiana.edu).