To speed things up, you may also define primary and secondary pairs before
you run ICKDSF with ERASEDATA. That will ease the load on the channels (or
halve the time required to erase everything) and make the subsystem do extra
work for you. Then maybe break the pairs, swap the primaries and
Then maybe break the pairs, swap the primaries and secondaries and rerun
the erase.
To be clear, break the pairs only after they are fully synced.
Ivica
A process like rewriting data with different patterns is modeled after
traditional technology. We know at least of some DASD subsystems where
the remaining 24 rewrites would not cause writing at the same location
on a disk, and thus not achieve what you meant to do. Those funny
patterns tend
] On Behalf Of Alan Altmark
Sent: Monday, December 08, 2008 11:50 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Shark Retiring
On Monday, 12/08/2008 at 01:53 EST, Schuh, Richard [EMAIL PROTECTED]
wrote:
Only 6? In 1968, I saw a report that stated that the folks at
installation code CAD could read
On Tuesday, 12/09/2008 at 04:21 EST, Rob van der Heij [EMAIL PROTECTED]
wrote:
I would hope the DASD subsystem also has some facility that implements
what's required in the device to wipe out data.
I've got calls into Storage people to tell me where The Documentation is
on how to decommission
Message-
From: The IBM z/VM Operating System
[mailto:[EMAIL PROTECTED] On Behalf Of Alan Altmark
Sent: Tuesday, December 09, 2008 1:35 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Shark Retiring
On Tuesday, 12/09/2008 at 04:21 EST, Rob van der Heij
[EMAIL PROTECTED]
wrote:
I would
We are about to retire a 2105-F20 Shark, which will be resold. The best
way to totally delete all our data from the Shark?
Thanks,
Mary Zervos
Systems Programmer
Binghamton University
Check with your IBM C.E., they have the good stuff.
-Original Message-
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED]
Behalf Of Mary Zervos
Sent: Monday, December 08, 2008 8:52 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Shark Retiring
We are about to retire a 2105-F20 Shark
You can try using ICKDSF and write patterns of data on it to clear what
was there. This may not be good enough for some organizations but
is good enough for most. You can try something like the following:
TRKFMT UNIT(xxx) NVFY ERASEDATA CYLRANGE(,) CYCLES(x)
Aria.
On Mon, 8 Dec 2008
@LISTSERV.UARK.EDU
Subject: Re: Shark Retiring
You can try using ICKDSF and write patterns of data on it to clear what
was there. This may not be good enough for some organizations but
is good enough for most. You can try something like the following:
TRKFMT UNIT(xxx) NVFY ERASEDATA CYLRANGE(,) CYCLES
@LISTSERV.UARK.EDU
Subject: Re: Shark Retiring
What would be the minimum acceptable value for CYCLES(x) to ensure data
was not retrievable?
From: The IBM z/VM Operating System [EMAIL PROTECTED] On Behalf
Of Aria Bamdad [EMAIL PROTECTED]
Sent: Monday, December 08, 2008
Mary,
TRKFMT is very slow process.
We have to wipe out our DR site at each test. Cycle for us is 3.
To do that I have developped something around DUPLICATE HiDRO cmd. The idea
is to TRKFMT volume A, B and C (3 cycles). Then we duplicate A to A', B to
B' and C to C' and again A to A, A to B and C
With a small change to my BUSERVER, ICKDSF TRKFMT commands could be
dispatched to 1 to 99 worker machines.
2008/12/8 Alain Benveniste [EMAIL PROTECTED]
Mary,
TRKFMT is very slow process.
We have to wipe out our DR site at each test. Cycle for us is 3.
To do that I have developped something
On Mac OS X's Disk Utility there are Secure Erase Options and under a 7-Pass
Erase it says that it meets the US Department of Defense 5220-22 M standard
for securely erasing magnetic media. There is also a 35-Pass Erase option
with no standard attached to it. I always wondered why is it there...
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