Sometimes when I put ESX host in maintenance mode, some VMs do not move to another ESX host.
some of the VMs have CD/DVD drive1 connected to ISO Image on Local Disk.
Some don't have the CD/DVD connected, but still do not move
we have 6 hosts, and there are enough resources for vmotion
If I remember Hanccocka explained that to me..I cannot remember where I put the notes (:)