If you have the DD setup as a BasicDisk, AdvancedDisk, Media Server Deduplication Pool (MSDP), or PureDisk Deduplication Pool (PDDO) you should be fine. Just make sure your DD is suported with 7.6
Refer to pages 169-172 of the Symantec NetBackup 7.6 for VMware Administrator's Guide (DOC6461) for more information on requirements and recomendataions
Note the Performance recommendations for Instant Recovery for VMware:
High performance in virtual machine instant recovery depends on your physical
storage and network infrastructure. You must have adequate network speed from
the media server to the VMware ESX host. For good Storage vMotion performance
with the least effect on the restored virtual machine in the production environment,
SAN storage is recommended.
Symantec recommends the following:
- A SAN connection from the NetBackup media server and its disk storage unitto the ESX host.
- For Fibre Channel SAN, a minimum speed of 4 gigabits per second.
- For iSCSI SAN, a minimum speed of 1 gigabit per second.
- When you use Storage vMotion to migrate a restored virtual machine, migrate one virtual machine at a time per media server. The migration may be slow if you simultaneously migrate multiple virtual machines per media server.
- For disaster recovery testing, Symantec recommends that you restore no more than 3 or 4 virtual machines per media server. The number to restore depends on the I/O load on the media server. Symantec recommends restoring each VM one-by-one, not simultaneously.
