In a previous instance of my career, I was a member of a team that tested a
security product, not RACF and had to verify that the space was "ERASED" and
this was done by using SPACE with it's "ABSTR" format and SMS was not as
popular as it is today.
To request specific tracks: SPACE= (ABSTR,(primary-qty,address [,directory])
Request for Specific Tracks
For an SMS-managed data set (one with an assigned storage class), do not code
ABSTR.
ABSTR
Requests that the data set be allocated at the specified location on
the volume.
primary-qty
Specifies the number of tracks to be allocated to the data set.
The volume must have enough available space for the primary quantity.
If it does not, the system terminates the job step.
address
Specifies the track number of the first track to be allocated. Count
the first track of the first cylinder on the volume as 0. Count through the
tracks on each cylinder until you reach the track on which you want the data
set to start.
address
Specifies the track number of the first track to be allocated. Count
the first track of the first cylinder on the volume as 0. Count through the
tracks on each cylinder until you reach the track on which you want the data
set to start. The absolute track address must be a decimal number equal to or
less than 65535.
Note: Do not request track 0.
Al Nims
Systems Admin/Programmer 3
Information Technology
University of Florida
(352) 273-1298
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of Gerhard Postpischil
Sent: Wednesday, April 09, 2014 10:53 AM
To: [email protected]
Subject: Re: Accessing DASD areas that have no DSCB (UNCLASSIFIED)
On 4/9/2014 10:27 AM, Storr, Lon A CTR USARMY HRC (US) wrote:
> Can someone please identify the flaw in my logic? Can a non-authorized
> user gain access to these "scratched" areas of DASD?
I'd add 4) - many modern control units have diagnostic capability that allows
unrestricted hardware access to the drives. If yours do, you'll need physical
access controls.
I first ran into this when we got our first string of Hitachi 3380s. The C.E.
wanted a telephone line so he could service the units remotely; I had to
educate management that that would allow uncontrolled access to customer data.
Gerhard Postpischil
Bradford, Vermont
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