Vsphere4 Solaris x86 Virtual Machines - Corruption of SVM partitions following migration\failover

We currently have Solaris x86 VMs built on disks presented to us by another area of our IT organisation using Vsphere 4.

Typically the VMware presents us with two "virtual disks" one for root and another for data.

Once Solaris is installed, to overcome the restriction of available slices on VTOC we use SVM to create around a dozen soft partitions from the data disk.

There is no mirroring or RAID involved, we are simply using SVM as a partition manager.

As part of our Disaster Recovery procedures our colleagues regularly migrate VMs to another datacentre, the VMs with soft partitions become corrupt and have to be rebuilt.