Alan,
There are several tools which allows user to read "free" disk space.
ADRDSSU, AMASPZAP, DITTO are few of them. However those tools require
some special authorization, all of the tools I mentioned are controlled
by RACF CL(FACILITY) profiles (and can be blocked at all using PROGRAM
class) - so I wouldn't worry about them. BTW: those tools should be
reasonably controlled for other reasons
The problem is it can be AFAIK possible to read the disk space using
IEBGENER (assuming user created a dataset on the interesting tracks).
This possibility is reduced/blocked for SMS-managed disks.
Of course the best method to protect "obituary" data is to erase it. The
best method to erase the data is to use ERASE in RACF (IMHO preferred)
or VSAM (limited to VSAM). Of course ERASE is not free, it takes
considerable resources.
HTH
--
Radoslaw Skorupka
Lodz, Poland
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