Method and device for managing a hybrid storage disk array

A device for managing a hybrid storage disk array, wherein the hybrid storage disk array comprises a first type of storage disk and a second type of storage disk, the device including:

• a processor;
• and
• a memory coupled to the processor and having instructions stored thereon for execution by the processor, the instructions, when executed by the processor, causing the device to:
• in response to a first data portion of a first extent in a first set of extents of the first type of storage disk being unavailable, obtain a metadata portion of a second extent in a second set of extents of the second type of storage disk;
• read, from the metadata portion, reconstruction information for reconstructing the first data portion;
• and
• reconstruct, based on the reconstruction information, the first data portion on a third extent in the first set of extents.

A computer program product being tangibly stored on a non-transient computer-readable media and comprising machine-executable instructions which, when executed, cause a machine to:

• in response to a first data portion of a first extent in a first set of extents of a first type of storage disk being unavailable, obtain a metadata portion of a second extent in a second set of extents of a second type of storage disk;
• read, from the metadata portion, reconstruction information for reconstructing the first data portion;
• and
• reconstruct, based on the reconstruction information, the first data portion on a third extent in the first set of extents.