Erase hard disk

UNIX AIX
1

Hi ...
How to erase bootable hard disk in Pseries...

2

Export VG, create a new VG and write it full with something, for example with dd. Also there might be some professional tools out there - not sure if they do more or better than this.

3

boot from NIM and then use the smitty menus and run the SCSI erase procedure.

4

Hello sumarthi,

You have 2 options here:

Option 1:Wipe disk using Diag boot
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  1. Assuming it is rootvg disk, you have to start(boot) the server using AIX Diagnostic CD.
  2. Task Selection -> Format Media (if the disks are from datavg, make sure you format rootvg disk last in sequence)
    -> select disk(select disk using enter, proceed using F7 rootvg disk do in sms mode)
    -> Erase Disk -> Enter, Yes-> Write patterns to drive
    -> choose number of different pattern to write (3 patterns is sufficient, according to dept of defense standard, others option optional) -> F7(commit)

Option 2:Zero Filled the hdisk manually using cmd line
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  1. Depending on your requirements there are a couple of ways to do this.
    If your requirment is to keep the average hacker from getting to the
    data then the following dd command works great:

    # dd if=/dev/zero of=/dev/rhdisk0 bs=1m
    (dd the disks with the rootvg last)

  2. eg:
    hdisk0 00c7ae3a90d38044 rootvg active
    hdisk1 00c7ae3a95f249c6 datavg active
    hdisk3 00c7ae3ae5ec7b97 datavg2 active
    hdisk4 0002c6bf97d139ad testvg active

    Set a loop script with the rootvg hard disk last to be wiped:

    "for x in 4 3 1 0
    do
    dd if=/dev/zero of=/dev/rhdisk$x bs=1m
    done"

    Then I do other stuff and check it after a few hours.
    Test to see if the machine will boot, definitely it won't. Success!

p/s : Thanks Neo for the nomination. Appreciate!

GOOD LUCK!
Shiniraz
Malaysia