From: Copeland KCK, Rich (Rich.Copeland.KCK@gentiva.com)
Date: Tue Feb 17 2004 - 10:48:31 EST
*** Original Message/Request ***
Tru64 Admins ... your opinion please ...
To fully eradicate a disk before retirement my memory wants me to think that the command:
# diskx -f /dev/disk/disk0c -w -pattern 99
will do the trick, anyone have any other ideas or will confirm this plan please.
Regards,
Rich Copeland KCK
*** Thank you for your opinion ***
Dr. Thomas Blinn
Alan Rollow
Rick Kelly
Phillip Brown
S Thangavelu
John Lanier
*** Solution chosen ***
# man zeero
Reformatting page. Please wait ... completed
zeero(8) zeero(8)
NAME
zeero - Zero out disks prior to rewrite.
SYNOPSIS
/usr/lbin/zeero [-d] [-f] device
OPTIONS
-d Specifies diagnostic mode. Prints the total number of writes and the
exit errno. An exit status of errno 28 indicates success; zeros were
written until the device ran out of space.
-f Specifies silent mode. This option does not prompt for a response. If
the -f option is not used, the user is warned that all data will be
erased from /dev/rdisk/dsk?? and asked for an affirmative response
before continuing.
DESCRIPTION
The zeero command writes zeros throughout a disk partition including the
disk label. You must be super user to use this command.
EXAMPLES
1. In the following example, the zeero command is used to overwrite par-
tition a with zeros.
/usr/lbin/zeero /dev/rdisk/dsk1a
2. In the following example, the zeero command is used to overwrite the
entire disk with zeros.
/usr/lbin/zeero /dev/rdisk/dsk0c
FILES
/usr/lbin/zeero
#
# /usr/lbin/zeero -d /dev/rdisk/dsk5c
******** W A R N I N G ********
This program will completely erase all data on /dev/rdisk/dsk5c.
Are you sure you want to do this (y/n): y
Cleaning /dev/rdisk/dsk5c.....number of writes = 555544, errno = 28
done.
#
# dd if=/dev/rdisk/dsk5c
dd: 71109623+0 records in.
dd: 71109623+0 records out.
#
<nothing was returned>
#
# disklabel -r dsk5
disklabel: Disk /dev/rdisk/dsk5c is unlabeled
#
If I were to guess I think zeero is doing a:
# dd if=/dev/zero of=/dev/rdisk/dsk5c
underneath.
*** Other solutions were offered; however this one seems to be adequate for our requirements.
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