| 主权项 |
1. A method for use in managing degraded storage elements in data storage systems, the method comprising:
identifying a storage element experiencing degradation, the storage element being a member of a first redundant array of independent disks (RAID) group including multiple storage elements, wherein the first RAID group includes at least three different storage tiers, a first tier having higher performance characteristics than a second tier and the second tier having higher performance characteristics than a third tier, wherein the first RAID group comprising the identified degraded storage element is designated as operating in a degraded mode; providing a spare storage element, the spare storage element arranged as a hot spare for the first RAID group, and initiating a rebuild procedure to rebuild data associated with the degraded storage element onto the spare storage element; identifying a first slice of data associated with the first RAID group comprising the degraded storage element and determining a temperature and storage tier of the first slice; based on the temperature and storage tier of the first slice, copying the first slice of data to a second RAID group of storage elements, wherein the second RAID group includes at least three different storage tiers, a first tier having higher performance characteristics than a second tier and the second tier having higher performance characteristics than a third tier, wherein copying includes copying the first slice of data residing on a first tier to a storage tier having second tier, wherein the second tier has higher performance characteristics than the first tier; and prior to completing the rebuild process, designating the first RAID group comprising the identified degraded storage element as operating in a non-degraded mode. |
