HP P3410A HP NetRAID 1M/2M Installation & Configuration - Page 28
Table 2-2. RAID Level Summary for Spanned Arrays, RAID Level, RAID 10, RAID 50
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Chapter 2 RAID Overview Table 2-2. RAID Level Summary for Spanned Arrays RAID Level Also Known As Fault Tolerance Redundancy Type Hot Spare Option Disks Required: spans 2 arrays spans 3 arrays spans 4 arrays spans 5 arrays spans 6 arrays spans 7 arrays spans 8 arrays RAID 10 striping with mirrored arrays yes duplicate yes 4 6 8 10 12 14* 16* Usable Capacity least Capacity Reduction 50% Read Performance Random Write Performance Sequential Write Performance Typical Usage intermediate intermediate intermediate Mostly small random writes with fault tolerance and enhanced speed RAID 50 striping with distributed parity yes parity yes 6, 8, 10, 12, 14*, 16*, 18*, 20*, 22*, 24* 9, 12, 15*, 18*, 21*, or 24* 12, 16*, 20*, or 24* 15* or 20* 18* or 24* 21* 24* intermediate capacity of one disk for each array spanned fast slow slowest Mostly small, random transfers with fault tolerance and enhanced speed *HP NetRAID-2M only. The 1M can only support up to 12 disks per adapter while the 2M can support up to 24 disks per adapter, using external disk enclosures. 20