Pure Storage, Inc.
Drive, blade, or data shard decommission via RAID geometry shrinkage

Abstract:

In one implementation, a method includes detecting, by a storage system controller associated with a plurality of storage devices, a first anomaly corresponding to a first data shard of a redundant array of independent disks (RAID) group and determining, by the storage system controller, that the first anomaly corresponding to the first data shard is not to be corrected within the RAID group. The method further includes removing the first data shard from the RAID group and recalculating, by the storage system controller, one or more error recovery codes corresponding to the RAID group from a plurality of remaining data shards of the RAID group, without the first data shard.