Switch to GPT-format disk images.

src/platform/init/chromeos_startup

 #!/bin/sh
 
 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 HAS_INITRAMFS=0
 if [ -d /dev/.initramfs ]
 then
   # The initrd will have mounted /sys, /proc, and /dev for us.
@@ skipping 18 matching lines @@
 # Splash screen!
 if [ -x /usr/bin/ply-image ]
 then
   /usr/bin/ply-image /usr/share/chromeos-assets/images/login_splash.png &
 fi
 
 mount -n -t tmpfs tmp /tmp
 mount -n -t tmpfs -onosuid,nodev shmfs /dev/shm
 mount -n -t devpts -onoexec,nosuid,gid=5,mode=0620 devpts /dev/pts
 
-# Mount our stateful partition
-ROOT_DEV=$(sed 's/.*root=\([^ ]*\).*/\1/g' /proc/cmdline)
-if [ "${ROOT_DEV#*=}" = "$ROOT_DEV" ]
-then
-  # We get here if $ROOT doesn't have an = in it.
-
-  # Old installations have system partitions on partitions 1 and 2. They
-  # have the stateful partition on partition 4. New installations have
-  # partitions 3 and 4 as system partitions and partition 1 as the stateful
-  # partition.
-  STATE_DEV=$(echo "$ROOT_DEV" | tr 1234 4411)
-else
-  # $ROOT has an = in it, so we assume it's LABEL= or UUID=. Follow that
-  # convention when specifying the stateful partition.
-  STATE_DEV="/dev/disk/by-label/C-STATE"
-fi
+# Mount our stateful partition. It's always partition 1.
+ROOT_DEV=$(rootdev)
+STATE_DEV=${ROOT_DEV%%[0-9]*}1
 mount -n -t ext3 "$STATE_DEV" /mnt/stateful_partition
 
 # Make sure stateful partition has some basic directories
 mkdir -p -m 0755 /mnt/stateful_partition/var/cache
 mkdir -p -m 0755 /mnt/stateful_partition/var/log
 mkdir -p -m 0755 /mnt/stateful_partition/home
 mkdir -p -m 0755 /mnt/stateful_partition/etc
 chmod 0755 /mnt/stateful_partition/var
 
 # Default to Pacific timezone if we don't have one set
@@ skipping 27 matching lines @@
 (test -f "$SALT" || head -c 16 /dev/urandom > "$SALT") &
 
 # Write out uptime and disk stats pre/post startup
 cat /proc/uptime > /tmp/uptime-post-startup
 ! cat /sys/block/sda/stat > /tmp/disk-post-startup
 echo "$PRE_UPTIME_STAT" > /tmp/uptime-pre-startup
 echo "$PRE_DISK_STAT" > /tmp/disk-pre-startup
 
 # Always return success to avoid killing init
 exit 0