This bug was fixed in the package cloud-initramfs-tools - 0.3ubuntu1
--------------- cloud-initramfs-tools (0.3ubuntu1) precise; urgency=low
* growroot: unmount root before attempting to grow the root partition (LP: #906722). -- Scott Moser <email address hidden> Tue, 20 Dec 2011 13:24:45 -0500
This bug was fixed in the package cloud-initramfs -tools - 0.3ubuntu1
--------------- -tools (0.3ubuntu1) precise; urgency=low
cloud-initramfs
* growroot: unmount root before attempting to grow the root
partition (LP: #906722).
-- Scott Moser <email address hidden> Tue, 20 Dec 2011 13:24:45 -0500