You need to create a volume (or volumes) on the Sun StorageTek 53xx NAS before installing Messaging Server. To avoid disk I/O bottlenecks, configure the system with as many Logical Unit Numbers (LUNs) as possible. Note that more LUNs in a volume means longer RAID reconstruction time in case disk failure happens.
The message store file system on the Sun StorageTek 53xx NAS can only be mounted by one Messaging Server host. Sharing the same message store file system by more than one Messaging Server is not supported.
Refer to the Sun StorageTek documentation for instructions on creating volumes: