Here is a quick tip you can use when adding new disks to a VIO Server, this helps you locate the new disks easier than searching the whole lspv output!!
# Login to the vio server as padmin.
# Take an lspv listing before you add the disks.
lspv | awk '{ print $1 }' | tee lspv.before
# Now configure the new disks.
cfgdev
# Run an lspv, but filter out the disks we had before. All you should see are the new disks.
lspv | grep -v -w -f ./lspv.before
hdisk8 none None
# Confirm the new disks are the correct size.
lspv -size hdisk8
524288
