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format HP-UX disk

 
SUBRAMANYAM ANUPINDI_1
Frequent Advisor

format HP-UX disk

Hi,

We are decommissioning our prod boxes which have HP-UX 11i Ver1 O/S on it. We want to format disks to clean up data.

a) We want to cleanup data so that data can't be recovered with any method

b) We want to use these disks again for some other purpose.

I read about "mediainit" and assume that will work for both a) and b)

1)If "mediainit" works can some one give me detail steps on how this can be done.

2)If "mediainit" is not the option than what is the other methods to do this.

Thanks
10 REPLIES
Torsten.
Acclaimed Contributor

Re: format HP-UX disk

>> a) We want to cleanup data so that data can't be recovered with any method


Any method?

Shredder them.

Hope this helps!
Regards
Torsten.

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Matti_Kurkela
Honored Contributor

Re: format HP-UX disk

If the data on the disks is worth more than the price of new disks, the most reliable method is to actually physically destroy the disks.

But if the disks need to be reusable, overwriting the data (possibly multiple times) is the best you can do.

For any disks manufactured in this century, "mediainit" is not recommended:

http://viktorbalogh.net/blog/hp-ux/hp-ux_sysadm/some-thoughts-about-mediainit-low-level-formatting-and-why-it-mustnt-be-done

Michael Roberts' answer in this old thread includes instructions for building a custom Ignite boot media (=a bootable tape) that will completely overwrite all disks attached to a HP-UX system with zero bytes:

http://h30499.www3.hp.com/t5/General/Best-way-to-DOD-wipe-drives-with-sensitive-data/m-p/4926568#M159101


MK

MK
Mel Burslan
Honored Contributor

Re: format HP-UX disk

Please keep in mind that, short of taking a sledge hammer and a power drill to physically destroy the storage platters of a disk drive, you DO NOT have a 100% proof way of wiping out your data. With the sufficiently high tech devices and methods, your data can be dug up from wipe-out by any kind of software method.

Having said that, running your disk thruough this command, several times in succession, should give you a peace of mind :

dd if=/dev/urandom of=dev/rdsk/cXtXdX bs=8192k

Hope this helps.
________________________________
UNIX because I majored in cryptology...
SUBRAMANYAM ANUPINDI_1
Frequent Advisor

Re: format HP-UX disk

Thanks all for reply. I can compromise data for re-use. These disks will be used within our company and data security shouldn't be that serious.

So, can i run dd command on non O/S disk while system is UP and finally run on O/S disks. Our O/S disks are software mirrored on two disks. How we can do this for O/S disks

Pete Randall
Outstanding Contributor

Re: format HP-UX disk

> How we can do this for O/S disks

Same way as for the other disks. The only difference is that the dd will eventually fail when it overwrites enough of the OS and the machine fails.


Pete

Pete
Mel Burslan
Honored Contributor

Re: format HP-UX disk

or, you wipe out the non-os disks first. Build your new OS on the newly wiped disks. Once the system is bac alive, wipe out the old OS disks using the same method.

Hope this helps
________________________________
UNIX because I majored in cryptology...
TwoProc
Honored Contributor

Re: format HP-UX disk

Just be aware that for SSD's this is an altogether different question, in which it is extremely impractical to think you can wipe out a disk, as you can never "see" all of the flash memory to wipe it out, you can only "see" what's presented *as a disk*.
We are the people our parents warned us about --Jimmy Buffett
donna hofmeister
Trusted Contributor

Re: format HP-UX disk


You may wish to consider WipeDisk/ux from Allegro Consultants (www.allegro.com). The product can be rented if you don't have an on-going need for the product.
Michael Leu
Honored Contributor

Re: format HP-UX disk

This is what I do to clean the boot disks:
1) boot Ignite 11.31 from network
2) select [ Run an Expert Recovery Shell ]
3) tftp the files 'libpthread.so.1' and 'mediainit' from another system
4) chmod u+x mediainit
5) mv libpthread.so.1 /usr/lib/hpux32/
6) mediainit -S
Ismail Azad
Esteemed Contributor

Re: format HP-UX disk

Hi,

One way to toast the drive...Adding to the shredder comment by Torsten... Well 'popular mechanics' have described the "shredding" and how to go about it. It was amusing reading this...

"We still suggest a software shredder first, but if your personal data security justifies the extra effort, put on protective eyewear and gloves, then break out the power tools. Drilling four holes through the platters will ensure that they never spin properly again. Better yet, unscrew and remove the top lid of the drive, and go at the platters with a sander or angle grinder. Scuff the surface of the platters until all the shine is gone."

So now you need to buy some tools and protective wear...:)...As Mel mentioned this will not be enough....

Regards
Ismail Azad
Read, read and read... Then read again until you read "between the lines".....