Patent ID: 8234445
Filing Date: 2012-07-31
Classification: G06F,G11B

Abstract:
1. A redundant data storage system comprising: a redundant PSD array comprising a plurality of physical storage devices (PSDs); wherein the redundant PSD array is divided into a plurality of stripes each comprising a plurality of payload data chunks and a plurality of parity data chucks, so that the data of at least one basic data access unit of each of the plurality of payload data chunks which are inactive can be rebuilt by an arithmetic process performed on, the plurality of parity data chunks and one or more the payload data chunks which are active; each of the plurality of payload data chunks and parity data chunks comprises: at least one basic data access unit and at least one data protection field, wherein for each of the plurality of payload data chunks, the data protection field is a first data protection field used to store data protection information comprising a logical block guard subfield, a logical block application tag subfield and a logical block reference tag subfield in order to protect the data stored in the basic data access unit of the payload data chunk; and for each of the plurality of parity data chunks, the data protection field is a second data protection field comprising plural subfields, wherein different combinations of the subfields are used to store a plurality of check data sets in order to protect the data in the data protection field of the payload data chunk.