The Network Automation NT-4000 uses a RAID (Redundant Array of Independent Disks) 10 array to provide the optimum mix of high database performance and redundant data storage with recovery features in the event of disk failures.
RAID 10 uses a minimum of four disk drives to create a RAID 0 array from two RAID 1 arrays, as shown in Figure 18. It uses mirroring and striping to form a stripe of mirrored subsets. This means that the array combines — or stripes — multiple disk drives, creating a single logical volume (RAID 0). RAID 10 combines the performance of RAID 0 and the high fault tolerance of RAID 1. Striping disk drives improves database write performance over a single disk drive for large databases. The disks are also mirrored (RAID 1), so that each disk in the logical volume is fully redundant. Figure 8 illustrates the principle.
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