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SubjectRe: ext2 not NULLing deleted files?
Regarding the need to do more than just zero unwanted data, I note that
there is a U.S. DOD MIL-SPEC (no, I do not know the number) which defines
a sequence of patterns to be used for erasing magnetic media. VMS has a
hook on which one may hang one's own erasure pattern generator, and I
think DEC provided an unsupported implementation of the MIL-SPEC patterns
as an example of its use. INITIALIZE /ERASE can use the patterns, but I
don't recall whether DELETE /ERASE does. If you don't provide a
generator, I think erasure just uses zeros.

I recall hearing that highly-classified data must be destroyed by
physically shredding the medium. Yes, throw your disk drive in the
shredder! (Just imagine the class of machinery required to digest an RA81

Most of this goes way beyond the need to deter casual snooping.

Mark H. Wood, Lead System Programmer mwood@IUPUI.Edu
Make a good day.

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