Patent attributes
A RAID storage-device-assisted deferred Q data determination system includes a RAID primary data drive that retrieves second primary data via DMA with a host system, and XOR's it with its first primary data to produce first interim parity data that it DMA's to a RAID parity data drive. The RAID parity data drive XOR's its first parity data and the first interim parity data to produce second parity data. The RAID parity data drive also performs GF operations on the first interim parity data and its second interim parity data and XOR's the results to produce first interim Q data that it DMA's to a RAID Q data drive. The RAID Q data drive XOR's the first interim Q data and its second interim Q data to produce third interim Q data that it XOR's with its first Q data to produce second Q data.