Patent ID: 7797488

Claim:
A method of creating a multiple of virtual Serial Advanced Technology Attachment ports in a disk array controller, comprising: installing a disk set in said disk array controller, and said disk set is comprised of a plurality of disks, and said each disk is divided into a plurality of data blocks corresponding to data blocks of other disks of the same disk set for creating a plurality of logical disk sets respectively; building a port multiplier into said disk array controller by a software method, and said port multiplier defines a plurality of slices capable of identifying the address of a computer host system; constituting a one-to-one correspondence between said slices defined by said port multiplier and said plurality of logical disk sets respectively; thereby, a method for said Serial Advanced Technology Attachment disk array system connects a plurality of storage units by a software method and overcomes the limitation of the point-to-point connection, so as to achieve a multi-driving function and a serial system bus, and also pursue a low pin count and a high-frequency transmission to accomplish a synchronously updated data backup system.