topic Re: Erase data in Operating System - HP-UX

Erase data

Vic S. Kelan — Thu, 16 Jun 2005 15:49:07 GMT

Hi all,

Any idea of any utility I can use to completely erase/delete data from an HPUX system?

We are implementing a DR test at a 3rd party site and management is kinda concerened about this data being able to be viewed some time later, any ideas other than a big magnet ;-)

Re: Erase data

RAC_1 — Thu, 16 Jun 2005 15:54:04 GMT

There are some utilities that can do what you want. Search for "erase disk" or something similar.

One way I do it is as follows.

Create /dev/zero file.
mknod /dev/zero c 4 0x000003

dd if=/dev/null of=/dev/rdsk/cxtxdx bs=1024k

Repeat the procedure for few times.

Anil

Re: Erase data

Mel Burslan — Thu, 16 Jun 2005 16:20:21 GMT

I think your question has been answered here on this thread :

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=820559

Re: Erase data

Patrick Wallek — Thu, 16 Jun 2005 16:22:58 GMT

If you are using some sort of disk arrays at the site, also make absolutely sure that you, or someone at the site, wipe out ALL of the LUN definitions on whatever disk array you use.

Doing that will make it that much more difficult to retrieve the data later.

Re: Erase data

TwoProc — Thu, 16 Jun 2005 16:24:06 GMT

RAC's response of
dd if=/dev/null of=/dev/rdsk/cxtxdx bs=1024k
was obviously supposed to be
dd if=/dev/zero of=/dev/rdsk/cxtxdx bs=1024k

... happens to everyone ...

Re: Erase data

Vic S. Kelan — Fri, 17 Jun 2005 10:34:14 GMT

Thanks for the usual support guys!!