HP Surestore Disk Array FC60 HP SureStore E Disk Array 12H User's and Service - Page 84

Concepts and Management Disk Array Features Disk Array Features This section describes some of the key features of the disk array. Understanding how these features work will allow you to use them to best advantage when managing your disk array. Dynamic Data Migration Unlike most conventional disk arrays, the disk array automatically manages its disks for the optimum balance of performance and storage efficiency. It achieves this through the use of an innovative technique called Dynamic Data Migration, which uses the best RAID level for storing data. Most disk arrays operate using a single RAID level. However, Dynamic Data Migration uses two levels: RAID 0/1, which optimizes performance, and RAID 5, which optimizes storage efficiency. Dynamic Data Migration combines the benefits of RAID 0/1 and RAID 5 while reducing the disadvantages of each. Dynamic Data Migration uses RAID 0/1 and RAID 5 exclusively, therefore all data is fully protected (redundant). Dynamic Data Migration optimizes performance and storage efficiency by changing the storage techniques used as the amount of data stored on the disk array increases. The following examples illustrate how Dynamic Data Migration manages the distribution of data during three different stages of capacity. 84 Concepts