svn commit: r222079 - head/usr.sbin/pc-sysinstall/backend
Josh Paetzel
jpaetzel at FreeBSD.org
Wed May 18 20:38:29 UTC 2011
Author: jpaetzel
Date: Wed May 18 20:38:28 2011
New Revision: 222079
URL: http://svn.freebsd.org/changeset/base/222079
Log:
Wipeout the end of disks, home to things like gmirror metadata, backup GPT tables,
and other potential evil.
Submitted by: Kris Moore <kris at pcbsd.org>
Approved by: kib (mentor)
Sponsored by: iXsystems
Modified:
head/usr.sbin/pc-sysinstall/backend/functions-disk.sh
Modified: head/usr.sbin/pc-sysinstall/backend/functions-disk.sh
==============================================================================
--- head/usr.sbin/pc-sysinstall/backend/functions-disk.sh Wed May 18 20:29:07 2011 (r222078)
+++ head/usr.sbin/pc-sysinstall/backend/functions-disk.sh Wed May 18 20:38:28 2011 (r222079)
@@ -582,17 +582,9 @@ stop_gjournal()
# Function to wipe the potential backup gpt table from a disk
clear_backup_gpt_table()
{
- # Get the disk block size
- local dSize="`gpart show $1 | grep $1 | tr -s ' ' | cut -d ' ' -f 3`"
-
- # Make sure this is a valid number
- is_num "${dSize}" >/dev/null 2>/dev/null
- [ $? -ne 0 ] && return
-
- # Die backup label, DIE
echo_log "Clearing gpt backup table location on disk"
- rc_nohalt "dd if=/dev/zero of=${1} bs=512 seek=${dSize}"
-
+ rc_nohalt "dd if=/dev/zero of=${1} bs=1m count=1"
+ rc_nohalt "dd if=/dev/zero of=${1} bs=1m oseek=`diskinfo ${1} | awk '{print int($3 / (1024*1024)) - 4;}'`"
} ;
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