| 摘要 |
Methods and structure for improved RAID storage subsystem performance in high bandwidth, a full stripe operating modes. The invention provides for flyby parity generation within the RAID storage controller for use of a high-speed memory buffer dedicated to XOR parity generation. As full stripe host supplied write data is transferred via a high-speed I/O channels from a host system to a data cache memory within the storage controller, flyby XOR parity generation using the high-speed XOR buffer generates the corresponding parity block. The generated parity block is then transferred to a corresponding location in data cache memory without the need for reading host supplied data blocks solely for purposes of generating parity.
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