Compaq ProLiant 1200 Manual page 7

ECG0094/1197
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Memory
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Compaq includes ECC memory in its servers to provide protection from memory errors in main
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system memory. The ECC memory scheme delivers superior error detection and correction
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capabilities, providing a greater level of data integrity for all network environments.
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ECC memory detects single and double-bit errors, and corrects single-bit errors. In Compaq
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servers, ECC errors are logged to the Server Health Log, where they are stored in non-volatile
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RAM that can be accessed by system administrators to help identify the cause of the errors and
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determine how best to correct the situation. Compaq Insight Manager can access and display Server
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Health Log information from remote consoles or via modem. For more information about ECC
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Memory, refer to white papers 100A/0395, ECC Memory and 618A/0796, Why Buy Compaq
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Memory?
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Primary and Secondary Storage
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Complex software, increasing dependence on business-critical data, shrinking backup windows
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these factors make reliable primary and secondary storage systems essential. Compaq offers a
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number of ways to prevent storage failure and allow rapid recovery if failure does occur.
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Compaq offers a variety of rigorously tested disk drives in hot pluggable and non-hot pluggable
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models. Compaq's industry leading qualification and testing process lowers the risk of disk drive
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down time by ensuring that the quality and performance of these hard drives is best-in-class and
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optimized for demanding server environments. Audit tests are performed in a realistic environment,
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with drives connected to intelligent controllers and mixed with other drives. Different combinations
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of hardware, configurations, and applications are tested. The test program includes controller fault
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tolerance testing, in which drive failures and power failures are artificially induced.
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Integration of Compaq drives with Compaq's array controllers provides leading fault tolerance and
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management, further minimizing system downtime. The ProLiant 2500, 5000, 6000, 6500, and
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7000 servers feature hot plug disk drives, which can be removed and replaced without shutting
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down the system.
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Compaq drives are covered by the Pre-Failure Warranty. As part of that coverage, Compaq Insight
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Manager constantly monitors hard drive and tape drive status, and proactively alerts system
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administrators to early problem indicators before an actual fault occurs. For more information
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about Compaq disk drives, see technology brief ECG026.0997, Why Buy Compaq Drives?
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On the ProLiant 6500 (and ProLiant external storage units), a duplex (or divided) backplane allows
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connection of two SCSI drive controllers to one backplane, so two drives or drive arrays can mirror
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data storage. This is a cost-effective improvement in data protection and availability.
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Increasingly complex network applications, migration of business-critical data to servers,
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consolidation of servers to centralize network management, and higher efficiency expectations
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create new data storage requirements. These requirements include capacity growth, data avail-
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ability, high performance, and manageability, all of which can be provided by a disk drive array.
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Compaq pioneered mainstream server disk drive arrays, and Compaq arrays are now in the seventh
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generation. The latest models include powerful troubleshooting features to help predict and prevent
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drive failure. Drive Parameter Tracking monitors drives and notifies the system administrator of
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potential problems, while Dynamic Sector Repairing scans hard disk drives for bad sectors and
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remaps the drives when necessary. In addition, ECC technology protects data in cache DRAM.
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Eliminating Single Points of Failure (cont.)