Abstract: A method for protecting snapshots related to a logical unit, the method may include retrieving snapshots blocks that were destaged in a storage system; processing, by the storage system, the snapshots blocks to provide, by an information protection module of the storage system, snapshots redundancy information; and storing the snapshots redundancy information in the storage system.

Abstract: A method for protecting snapshots related to a logical unit, the method may include retrieving snapshots blocks that were destaged in a storage system; processing, by the storage system, the snapshots blocks to provide, by an information protection module of the storage system, snapshots redundancy information; and storing the snapshots redundancy information in the storage system

Abstract: According to an embodiment of the invention there may be provided a method for multi-level disk failure protection, the method may include: calculating first parity information by processing a first data entity that is cached in a cache memory of a storage system thereby providing a first level of disk failure protection; destaging the first data entity and the first parity information to first physical addresses mapped to multiple disks; calculating extra parity information by processing the first data entity, wherein a combination of the first and extra parity information provides an extra level of disk failure protection that exceeds the first level of disk failure protection; and destaging the extra parity information to at least one second physical address that differ from the first physical addresses, the at least one second physical address are included in a spare physical memory space that is not allocated, at a time of the destaging of the extra parity information, for storing data.