Method, apparatus, and controller for managing storage array

摘要

A method, an apparatus, and a controller for managing a storage array that is divided into a first storage device subset and a second storage device subset according to degrees of wear of storage devices, where a minimum degree of wear of a storage device in the first storage device subset is greater than or equal to a maximum degree of wear of a storage device in the second storage device subset, and then, data in the second storage device subset is migrated to the first storage device subset or to-be-written data is written into the first storage device subset. Therefore, service lives of storage devices in the second storage device subset may be extended relatively by shortening service lives of storage devices in the first storage device subset.

主权项

1. A method for managing a storage array formed by N storage devices, the method comprising:
acquiring, by a controller, degrees of wear of the N storage devices; dividing the storage array into a first storage device subset and a second storage device subset according to the degrees of wear of the N storage devices, wherein a minimum degree of wear of a storage device in the first storage device subset is greater than or equal to a maximum degree of wear of a storage device in the second storage device subset; collecting statistics about a free storage space FreeSize in the first storage device subset; extracting data of FreeSize/(N−X) from each storage device in the second storage device subset, wherein X indicates the number of storage devices in the first storage device subset; and migrating the data extracted from the second storage device subset to the first storage device subset.