On Tue, 21 Feb 2012 16:19:53 -0600, Judy Schultz wrote:
>
>Thank you for your reply. If the Unconfigure unformats the disk group
>writing binary zeroes, why do you need to use the TRKFMT ERASEDATA
>CYCLES(1) command first before the Unconfigure?
>T
The debate rages. One side insists that one must overwrite the data many
times before it's really gone. For an opposing view, see:
http://www.h-online.com/security/news/item/Secure-deletion-a-single-overwrite-will-do-it-739699.html
... which mentions a more realistic concern that there may be residual
data in editor recovery files, page data sets, etc. And with modern
virtual DASD with technologies such as copy-on-write, you have little
assurance that you're overwriting the data you wish to secure.
-- gil
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