new backup format

until proxmox 2.2 the kvm backup file is tar.gz ou tar.lzo. Now have vma.gz ou vma.lzo.

I have a script to test backup file integrid:

for i in *.tar.lzo; do tar --lzop -xf $i -O > /dev/null 2> /dev/null;

rc=$?
if [[ $rc != 0 ]] ; then
echo Fail in $i
else
echo OK in $i
fi

With vma this not work... Any ideias ?