RE: complete "scrubbing" of our data from the disk

It would appear from the several documents I've see that adding the disk
to an array writes zeros, as does removing it (if you wipe data). Now,
it would be _very_ annoying, but an add/remove/add/remove/add/remove
sequence would write zeros six times, which IIRC is the minimum for DoD.
Then again, it's been a long time since I looked at DoD in detail.

-Walden 


------------
Walden H Leverich III
Tech Software
(516) 627-3800 x11
WaldenL@xxxxxxxxxxxxxxx
http://www.TechSoftInc.com
 Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
ChadB@xxxxxxxxxxxxxxxxxxxx
Sent: Wednesday, September 21, 2005 7:10 AM
To: Midrange Systems Technical Discussion
Subject: RE: complete "scrubbing" of our data from the disk






You won't see complete records perhaps, but if you look at the data
within DST you will be able to see more than you will probably be
comfortable with.  Enough to read names, SSNs, and ICD-9 or CPT codes
was what I remember seeing.  (Your record layouts will determine if the
chunks of data are usable for anything...)

I was told that at one point (break the arrays and it won't be
readable), and was surprised to see how much was 'legible' within DST.
The method mentioned in the link that Shalom Carmel posted does a pretty
good at cleaning things up (delete disk unit data), where just breaking
the arrays doesn't.  ESPECIALLY for the confidentiality concerns that a
hospital has... (that's where I worked when I checked the items from
DST).  I would be comfortable with going to the effort of zeroing the
data if you know where the drives are 'going to'.  Destroying the units
is probably extreme in most cases, but i'm sure it is a necessary step
for some shops.


 

             "John Candidi"

             <jacandidi@rutger

             sinsurance.com>
To 
             Sent by:                  "'Midrange Systems Technical

             midrange-l-bounce         Discussion'"

             s@xxxxxxxxxxxx            <midrange-l@xxxxxxxxxxxx>

 
cc 
 

             09/20/2005 03:17
Subject 
             PM                        RE: complete "scrubbing" of our

                                       data from the disk

 

             Please respond to

             Midrange Systems

                 Technical

                Discussion

             <midrange-l@midra

                 nge.com>

 

 





If they are raided, just break the arrays by throwing some of them away
today out of some of the arrays and other another day. Can't read the
data if the arrays are broken. I believe

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Henza, Guy
Sent: Tuesday, September 20, 2005 1:19 PM
To: midrange-l@xxxxxxxxxxxx
Subject: complete "scrubbing" of our data from the disk

We are going to get rid of some disks.  How do I do a complete
bit-overwrite before disposal?

Regards,

Guy Henza
Tri-State Hospital Supply Corporation
301 Catrel
Howell MI 48844
fon (517) 546-5400 x1312
fax (517) 540-1513
GHenza@xxxxxxxxx


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