Storage device and storage management method
摘要
說明書
If the life difference is equal to or greater than the threshold, the storage controller 10 creates an extent 40 for the first-order distribution and brings the extent 40 into the open state (step S203). For instance, the storage controller 10 selects one extent ID 521 corresponding to the state 523 indicating “EMPTY” from the extent state management table 520. The storage controller 10 brings the RAID configuration 522, the state 523, and the data distribution state 526 that correspond to the selected extent ID 521, into “2D+1P+1S,” “OPEN,” and “FIRST ORDER,” respectively. In the extent configuration management table 510, the storage controller 10 brings the RAID configuration 512 corresponding to the same extent ID 511 as the selected extent ID 521, into “2D+1P+1S” and appropriately assigns the attributes 514 to the entry IDs 513 corresponding to the extent ID 511.
