| High-Speed channel interface is an important factor that determines the I/Operformance of parallel storage system, and it can greatly improve the performance ofstorage system if the the data transfer capability of channel interface is exerted fully.Fibre Channel technology becomes the main part of high-performance network storagesystem for its' advantage of high performance long distance connection and highexpansibility. Based of the SCSI HBAs which comply with SCSI-3 protocol as thedevice channel and FC HBA which complies with FC protocol as the outer channel, thenew high-performance RAID storage system whose I/O performance is increased greatlyis designed and implemented. FC device driver is one key part of control software architecture of FC RAID, andhighly effective FC device driver can apparently improve the performance of the RAID.Developing FC device driver need further research on the working flow, developingplatform and the FC protocol standard. Based on the above research, Reduced InterruptOperation technology is presented to reduce system overhead and improve driver'sefficiency. And Scatter/Gather technology is also presented to reduce memory copycounts, reduce response time and effectively improve data transfer rate of RAID.Through the result of test, the conclusion is proved. Logical Volume Management, which is implemented in FC RAID, provides themapping from physical disks' storage resource to the uniform logical storage view. It canbe used to manage storage resource effectively and flexibly. Logical volumemanagement is one implementation of storage virtualization technology in FC RAID, andit can improve the expansibility and flexibility of RAID greatly.
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