Sun Microsystems Sun Fire V445 Server Administration Manual page 40

Other new features include the following:
Four hot-swap power supplies enable fully redundant AC/DC capabilities (N+N)
Fan trays are redundant and hot-swappable (N+1)
Increased data Integrity and availability for all SAS disk drives using HW Raid
(0+1) controller
Persistent storage of firmware initialization and probing
Persistent storage of error state on error reset events
Persistent storage of diagnostic output
Persistent storage of configuration change events
Automated diagnosis of CPU, memory, and I/O fault events during runtime
(Solaris 10 and subsequent compatible versions of Solaris OS)
Dynamic FRUID support of environmental events
Software readable chassis serial number for asset management
8 Sun Fire V445 Server Administration Guide • September 2007