I manage several V40Zs running Solaris 10, and these servers utilize the built-in hardware RAID controller. Siince the physical spindles are masked off from the operating system, using a tool like smartmontools to check disk health is not an option. Luckily Solaris shops with the raidctl utility, which provides insight into the status of both the controller and the disks that sit behind that controller:
$ raidctl
RAID Volume RAID RAID Disk
Volume Type Status Disk Status
------------------------------------------------------
c1t0d0 IM OK c1t0d0 OK
c1t1d0 OK
Since raidctl will display a disk fault when a drive fails, I run a shell wrapper from cron every fifteen minutes to check the RAID controller status. If the script detects a problem, it will send an email and generate a syslog entry to let folks know a problem exists. Viva la hardware RAID!