HP ProLiant 1200 Eliminating Single Points of Failure and Enabling Rapid Recov - Page 10
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ECG0094/1197 Eliminating Single Points of Failure (cont.) ... The Compaq DLT Library (Figure 5) provides unattended, automated backup. It has a cable management arm to prevent cable crimping or loss; high-capacity fans for significant cooling headroom, even for future higher speed drives; the ability to detect contaminated heads and notify the system administrator; a robotic mechanism and face plate of Teflon-impregnated polycarbonate to reduce drive and cartridge wear while minimizing the chance of contaminating the cartridge in the drive; and drive redundancy capabilities, with online drive replacement to eliminate downtime. Figure 5: Interior view of the DLT Library showing the robot and magazines with tapes. For more information about the Compaq DLT Library, see technology brief 272A/0797, Compaq DLT Library Technology. Power Compaq's power supply and power management technologies implement the latest developments to help ensure consistent, properly regulated power to the server and to help prevent data loss in the event of a complete external power failure. The design and testing phases of power supply development include rigorous testing to help ensure superior performance. On the Compaq ProLiant 6000, 6500, and 7000 servers, power supplies can be arranged in an n+1 configuration, where n equals the number of power supplies required to run the system. Power supplies share the load; one can fail without a loss of power to all components. With n+1 redundancy of hot plug power supplies, a system can quickly be brought back to a redundant configuration, without having been shut down. The power rails and control signals are isolated: In 98 percent of hot plug power supply failure events, other power supplies are not affected by the failure of one.