Access to a second HDD

Hello
How to access to a second hard disk on a HP-UX system?
Thanks

Can you be more explicit?

Thanks vbe
I have a hp-uxvtru64 using one hdd that is working correclty. i want to plug in another hdd and to access to both hdds using ftp tool (filezilla for example) because i want to copy some files from ond hdd to another.

After a reboot, running hwmgr -view devices would show the new device but Im not a tru64 geek, hp-ux is quite different...