H13-629: HCIE-Storage (Written)

Huawei OceanStor Dorado all-flash storage systems use the erasure coding (EC) algorithm for Dynamic RAID technology. In all-SSD configurations, the number of chunks (CKs) in a chunk group (CKG) can be adjusted dynamically. If a CK fails and no new block is available from disks outside the storage pool, the system dynamically reconstructs data from the original N + M stripes to new (N – 1) + M stripes. When new SSDs are added, the system reconstructs the CKG and dynamically migrates data from the (N – 1) + M stripes to the new N + M stripes.