Compaq 307560-001 Compaq ProLiant 2500 Server Technology - Page 14

201A/1196 TECHNOLOGY BRIEF (cont.) ... The ProLiant 2500 also supports use of a 1.6-inch non-hot-plug drive in each of two available half-height removable media bays shown in Figures 8 and 10. This capability allows the customer to create additional primary storage. It also allows a customer to increase availability by using the hot-plug drives for storing data in a RAID (redundant array of inexpensive disks) configuration and using non-hot-plug drives in the two half-height bays for mirroring the operating system. With such a configuration, if the active OS drive should fail, the system could quickly be reconfigured to boot the OS from the mirrored drive. If a data drive should fail, RAID would automatically rebuild any lost data. Power The ProLiant 2500 contains a 325-watt power supply that provides nominal output of +3.3 V, +5 V, +12 V, -5 V, and -12 V. The trend today is toward use of lower-voltage components. System memory in the ProLiant 2500, for example, operates at 3.3 V. In 1Q97 Compaq expects to have available a redundant power supply for the ProLiant 2500. This non-hot-pluggable option will provide two power supply modules within a single housing and will support two AC inlets. Intel Pentium Pro processors have precise voltage requirements; therefore, Pentium Pro-based systems need to provide dedicated voltage regulators for each processor (and for the processor support chips). The ProLiant 2500 includes a Compaq Processor Power Module for each processor. The Processor Power Module determines the precise voltage requirement of the processor and the support chip set. Then it ensures that the proper voltage is delivered to each component. 14