APPARATUSES AND COMPUTER PROGRAM PRODUCTS FOR A REDUNDANT ARRAY OF INDEPENDENT DISK (RAID) RECONSTRUCTION

摘要

The invention introduces an apparatus for a redundant array of independent disk (RAID) reconstruction, at least including a RAID group and a processing unit (110; 1410). The processing unit (110; 1410) starts an unused-space scan procedure to determine a logical address range that is a candidate to be skipped for the RAID group and send the logical address range to a stripe reconstruction procedure; and starts the stripe reconstruction procedure to receive the logical address range from the unused-space scan procedure, determine a stripe (230-1; 230-2; 230-3; 230-4; 330-1; 330-2; 330-3; 330-4; 1230-1; 1230-2; 1230-3; 1230-4) of drives of the RAID group to be skipped from being reconstructed according to the logical address range, and omit a reconstruction to the determined strip.