Update: SUMMARY: Wiping clean tru64 disks
From: Ricardo (Tru64 User) (tru64user_at_yahoo.com)
Date: 09/28/05
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- In reply to: Ricardo (Tru64 User): "SUMMARY: Wiping clean tru64 disks"
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Date: Wed, 28 Sep 2005 05:42:25 -0700 (PDT) To: tru64-unix-managers@ornl.gov
I ended up using zeero.....for tru64nix.
dban works great (easy to use) on x86....
--- "Ricardo (Tru64 User)" <tru64user@yahoo.com>
wrote:
>
> Overwhelming responses.....Thanks to all (10++).
> After
> quick check,it seems that i will try first
> DBAN....then shred. They seem more special purpose,
> but all others should work if procedures followed
> carefully it seems.
>
> Utils::
> diskx
> zeero (e.g. /usr/lbin/zeero -df /dev/rrz9c)
> dd e.g.(dd if=/dev/urandom of=/dev/rdsk/<your disk>
> bs=1024k conv=noerror)
> scu (Has an erase option)
>
>
> Longer Responses
> ___________________________________________________
> Move the disk to an Intel PC with a SCSI-controller.
> Buy Norton Ghost which includes a utility called
> GDISK.
> The GDISK can wipe disks completely, also at DOD
> requirements.
>
> A free tool is here: http://dban.sourceforge.net/
> ___________________________________________________
>
> But you can also use 'shred' (from GNU coreutils).
> You
> can
> give the number of passes there. It's based on
> Peter
> Gutmann's paper
> `Secure Deletion of Data from Magnetic and
> Solid-State
> Memory'.
>
http://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html
>
> _________________________________________________
> This will erase the label and write a standard label
> disklabel -z $DISK
> disklabel -rw $DISK
>
> Now you can just
> dd if=/dev/zero of=$DISK bs=1024k
>
> This may not work on the system disk, if you want to
> clean it, boot
> from
> cdrom into sing user (boot -fl single CDROM)
>
> One last word: If you are paranoid, you will not use
> /dev/zero as
> input.
> There are special devices that can read a byte from
> a
> harddrive after
> it was
> overwritten (with highly sensible heads). To
> increase
> entropy you use a
> file
> with random input. On a linx box you create a gig of
> plain garbage: dd
> if=/dev/random of=random bs=1024k count=1024
> Then you write this gabage to the target drive 2 or
> 3
> times. Game over
> now.
> ____________________________________________________
> If you have the system exercisers loaded, the diskx
> utility
> (/usr/field/diskx) write test to the raw "c"
> partition
> will
> do a very good job. I'm thinking there is a utility
> that
> does much the same thing. It's all about how
> thoroughly you
> want the data scrubbed. Oh, by the way, most SCSI
> disks can
> just be told (e.g., with the "scu" utility) to to a
> low-level
> format on themselves and that scrups the disk pretty
> clean
> and takes no host CPU cycles to do it, so if you are
> going to
> do a lot of disks, you can just kick off the format
> on
> each
> of them and then go away. Telling the system disk
> to
> format
> itself will wipe it clean and the system will likely
> panic.
>
> HUMOROUS::
> There is always a Microwave!
>
> --- "Ricardo (Tru64 User)" <tru64user@yahoo.com>
> wrote:
>
> > Hi,
> > I have seen this discussion here before but dont
> > remember the recommendation.
> > I am about to decomission some alpha PWS
> > XP1000's...and am wondering of the best method to
> > cleanup the disks completely, external as well as
> > internal.
> > I am thinking along the lines of using "dd" at the
> > moment...
> > Any suggestions welcome.
> >
> > _Thanks
> >
> > Richard
> >
> >
> >
> > __________________________________
> > Yahoo! Mail - PC Magazine Editors' Choice 2005
> > http://mail.yahoo.com
> >
>
>
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