HP ProLiant DL590/64 ProLiant DL590/64 Server Technology - Page 13

TECHNOLOGY BRIEF (cont.) SCSI - Small Computer Systems Interface TC020702TB ... Figure 12: Three redundant, hot-plug system power modules provide DC power to the server's components. The primary power supplies and their associated system power modules are N+1 redundant and load balancing. Two primary power supplies and system power modules can support a fully loaded ProLiant DL590/64 server; the third power supply and system power module provide redundancy. If one of the primary power supplies or system power modules fails, the redundant component takes the load while the failure is resolved. Since all the power supplies and system power modules are hot pluggable, a failed power supply can be replaced while the server is up and running. Redundant Hot-Plug Fans The ProLiant DL590/64 server includes two hot-plug system fans in the rear of the server; two fans in the front of the server provide redundancy. If one of the primary fans fails, a system alert triggers the associated secondary (or redundant) fan to take over automatically. The redundant hot-plug system fans protect the various server components from overheating and help prevent possible system interruption. Four additional hot-pluggable, redundant fans cool the system power modules, media bay, and PCI area of the server. Two of these 6-inch fans are required to cool the components, and two more provide redundancy. All of the fans in the ProLiant DL590/64 server are hot pluggable. They can be replaced while the server is up and running with absolutely no downtime. Hot-Plug Hard Disk Drives The ProLiant DL590/64 server supports four 1-inch, Wide Ultra-2 or Wide Ultra-3 SCSI, internal hot-plug hard disk drives. The internal drives can be controlled by an integrated Smart Array controller to optimize them for OS and boot support. When the server is configured for maximum capacity, it can support 291.2 GB of internal storage. 13