Depending on which driver your system is using,..
It looks like you should be using MegaCLI and MegaRAID Storage manager from LSI or Dells Open Manage Storage Administrator.
Use OMSA 5.1 or higher, including the OM Storage Services component, to manage your PERC 5 (and earlier) controllers.
The PERC 5 SAS RAID adapters cannot use the same LSI management tools as their SCSI RAID counterparts (PERC 4 and earlier). Instead, use the new LSI SAS RAID tools: MegaCLI, MegaRAID Storage Manager, MegaRAID SAS SNMP. Moritz Mertinkat has created a PERC 5/i + MegaCLI cheat sheet which provides useful instructions for managing this controller via the command line tool.
But that is just speculation since you never told us WHICH controller is actually in your machine ? PERC 5, PERC 6, other ?