It really depends upon how stringent the requirements are in the shop
where the person who posted the original question works. Here we have
some additional requirements, other shops may not.
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On
Behalf Of Mark Pace
Sent: Friday, February 25, 2011 2:52 PM
To: [email protected]
Subject: Re: Question about wiping a DS8100
Plus, unlike a PC drive, on the DS8100 the data is stripped over
multiple drives. Making data recovery on individual drives an exercise
in futility.
On Fri, Feb 25, 2011 at 3:00 PM, Robert A. Rosenberg
<[email protected]>wrote:
> At 14:34 -0600 on 02/24/2011, McBride, Catherine wrote about Re:
> Question about wiping a DS8100:
>
>
> Yes, using the web-based Storage Manager application to change the
> ranks
>> from one format to another will certainly work.
>> I was told that changing from one format to the other 3 times would
>> be best.
>>
>
> That need to switch 3 times is based on your level of desire to
> prevent recovery of your data. The first switch will remove all the
> directory data and overwrite all the tracks. That makes all the data
> vanish. However there are forensic methods that may be able to read
> the erased data although it has been overwritten. Thus the additional
> reformats (which makes the data harder to find on the drive using the
> forensic methods). This is the same situation as with PC Hard Drives
> and Secure Erase. You use a higher Secure Erase setting to rewrite the
> tracks more times. Unless you expect that someone is going to go to
> the trouble to do that level of data recovery, just removing the
> directories and overwriting the tracks (so the data is no longer there
for normal reading or viewing the tracks) should be enough.
>
>
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--
Mark D Pace
Senior Systems Engineer
Mainline Information Systems
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