Live Upgrade Patching Error: Unable to write vtoc for boot environment

 Attempting to patch several servers using live upgrade
Release: Oracle Solaris 10 8/11 s10x_u10wos_17b X86

Error I'm receiving is in the message in the log below

Code:

tail -15 /var/svc/log/rc6.log
Legacy init script "/etc/rc0.d/K50pppd" exited with return code 0.
Executing legacy init script "/etc/rc0.d/K52llc2".
Legacy init script "/etc/rc0.d/K52llc2" exited with return code 0.
Executing legacy init script "/etc/rc0.d/K62lu".
Live Upgrade: Deactivating current boot environment <sol10_U10x86>.
Live Upgrade: Executing Stop procedures for boot environment <sol10_U10x86>.
Live Upgrade: Current boot environment is <sol10_U10x86>.
Live Upgrade: New boot environment will be <patched_05102012>.
Live Upgrade: Activating boot environment <patched_05102012>.
ERROR: Live Upgrade: Unable to write the vtoc for boot environment
<patched_05102012> to device </dev/rdsk/c0t5000C50039FEF187d0s2>.
Partition 0 not aligned on cylinder boundary: "0 2 00 20352 286657920"
ERROR: Live Upgrade: Activation of boot environment <patched_05102012> FAILED.
Legacy init script "/etc/rc0.d/K62lu" exited with return code 0.