If you choose to use it, set up multipathing before you install Adaptive Server.
HP-UX 11.31 I/O stack offers the native MultiPathing (nMP) feature, which is embedded in the I/O stack. Mulipathing is enabled by default using nMP, and automatically detects and configures multipathing for all devices.
The /dev/rdisk/diskN devices are the persistent device special files. Use these device names to access the multipathed devices.