METHODS AND SYSTEMS FOR STORING DATA IN A REDUNDANT MANNER ON A PLURALITY OF STORAGE UNITS OF A STORAGE SYSTEM

摘要

Described herein are techniques for storing data in a redundant manner on a plurality of storage units of a storage system. While all of the storage units are operating without failure, only error-correction blocks are stored on a first one of the storage units, while a combination of data blocks and error-correction blocks are stored on a second one of the storage units. Upon failure of the second storage unit, one or more data blocks and one or more error-correction blocks formerly stored on the second storage unit are reconstructed, and the one or more reconstructed data blocks and the one or more reconstructed error-correction blocks are stored on the first storage unit.

主权项

1. A method for a storage system having a plurality of storage units, the method comprising:
while all of the storage units are operating without failure, storing only error-correction blocks on a first one of the storage units and storing a combination of data blocks and error-correction blocks on a second one of the storage units; and upon failure of the second storage unit, (i) reconstructing one or more data blocks and one or more error-correction blocks formerly stored on the second storage unit, and (ii) storing the one or more reconstructed data blocks and the one or more reconstructed error-correction blocks on the first storage unit.