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Full Discussion: Erase hard disk
Operating Systems AIX Erase hard disk Post 302369992 by shiniraz on Tuesday 10th of November 2009 05:50:53 AM
Old 11-10-2009
Debian

Hello sumarthi,

You have 2 options here:

Option 1:Wipe disk using Diag boot
**************************
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
*****************************************
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

Last edited by shiniraz; 11-10-2009 at 08:20 AM..
 

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hdio(7I)							  Ioctl Requests							  hdio(7I)

NAME
hdio - SMD and IPI disk control operations SYNOPSIS
#include <sys/hdio.h> DESCRIPTION
Note - The SMC and IPI drivers have been discontinued. dkio(7I) is now the preferred method for retrieving disk information. The SMD and IPI disk drivers supplied with this release support a set of ioctl(2) requests for diagnostics and bad sector information. Basic to these ioctl() requests are the definitions in <sys/hdio.h>. IOCTLS
HDKIOCGTYPE The argument is a pointer to a hdk_type structure (described below). This ioctl() gets specific information from the hard disk. HDKIOCSTYPE The argument is a pointer to a hdk_type structure (described below). This ioctl() sets specific information about the hard disk. /* * Used for drive info */ struct hdk_type { ushort_t hdkt_hsect; /* hard sector count (read only) */ ushort_t hdkt_promrev; /* prom revision (read only) */ uchar_t hdkt_drtype; /* drive type (ctlr specific) */ uchar_t hdkt_drstat; /* drive status (ctlr specific, ro) */ }; HDKIOCGBAD The argument is a pointer to a hdk_badmap structure (described below). This ioctl() is used to get the bad sector map from the disk. HDKIOCSBAD The argument is a pointer to a hdk_badmap structure (described below). This ioctl() is used to set the bad sector map on the disk. /* * Used for bad sector map */ struct hdk_badmap { caddr_t hdkb_bufaddr; /* address of user's map buffer */ }; HDKIOCGDIAG The argument is a pointer to a hdk_diag structure (described below). This ioctl() gets the most recent command that failed along with the sector and error number from the hard disk. /* * Used for disk diagnostics */ struct hdk_diag { ushort_t hdkd_errcmd; /* most recent command in error */ daddr_t hdkd_errsect; /* most recent sector in error */ uchar_t hdkd_errno; /* most recent error number */ uchar_t hdkd_severe; /* severity of most recent error */ }; SEE ALSO
ioctl(2), dkio(7I) SunOS 5.10 13 Aug 2002 hdio(7I)

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