RAID surveyor

摘要

A method for surveying a data storage subsystem for latent errors before a failing disk drive of the data storage subsystem fails and recovering unreadable data usable to reconstruct data of the failing disk drive. The method includes determining that a disk drive of a plurality of disk drives of the data storage subsystem meets a threshold for being identified as a failing disk drive, and prior to failure of the failing disk drive, surveying at least a portion of the data on the remaining plurality of disk drives to identify data storage areas with latent errors. The identified data storage areas may be reconstructed utilizing, at least in part, data stored on the failing disk drive.

主权项

1. A method for surveying a data storage subsystem for latent errors before a failing storage device drive of the data storage subsystem fails and recovering unreadable data usable to reconstruct data of the failing storage device drive, the data storage subsystem providing storage abstractions of a plurality of storage device drives, the method comprising:
determining a storage device drive of the plurality of storage device drives meets a threshold for being identified as a failing drive; upon identifying the storage device drive as a failing drive and prior to failure of the failing drive, identifying each data storage area of the remaining plurality of storage device drives required to rebuild all data stored on the failing drive were the failing drive to fail; surveying at least a portion of the identified data storage areas to identify any data storage area thereof with a latent error; and reconstructing the data storage area identified as having a latent error utilizing, at least in part, data stored on the failing drive.