Date: Wed, 18 May 2011 20:38:29 +0000 (UTC) From: Josh Paetzel <jpaetzel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r222079 - head/usr.sbin/pc-sysinstall/backend Message-ID: <201105182038.p4IKcT7Q007568@svn.freebsd.org>
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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@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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