attempting to upgrade g series cluster from 4.0.302 to 4.0.401 and it keeps failing. When it fails @7% I get mount iso error.  However more concerning is that it changes the dns on my vcsa to point to the PSC.  I upgraded a different cluster with (same source and destination builds) and it went through however it too changed the DNS on the VCSA to point to the PSC, changed the PSC to point to the VC and changed all the hosts to point to the PSC.  We have always used our corp DNS servers.

Anyone having experiencing this or similiar?