totally removing volume

hi,

I wan to move all data from one volume to another and I'm facing same problem as here again:

http://forums.zextras.com/zxpowerstore/455-moving-mailboxes-between-primary-volumes.html

but this time source volume is just two monts old, so there's no inherited problems from old zimbra versions.

I execute doVolumeToVolumeMove several times but there's still lot of .msg files behind.

source volume is a temporary nfs mount point and I need to reclaim all space.

how can I be totally sure all data is moved?