Patent ID: 6735676
Filing Date: 2004-05-11
Classification: G06F

Abstract:
In a data storage system including a storage unit, a first interface for performing data transfer complying with count-key-data (CKD) format with a first computer, a second interface for performing data transfer complying with Fixed Block Architecture (FBA) format with a second computer, and a storage control unit, responsive to data access requests from said first and second computers, for controlling data accesses to said storage unit, a data access control method executed by said storage control unit comprising the steps of:receiving a write request specifying an address complying with said CKD format from said first computer via said first interface; acquiring an address complying with said FBA format corresponding to said address complying with said CKD format; storing a data portion, included in a write data accompanying said write request, into said storage unit indicated by said address complying with FBA format and discarding a count portion and a key portion included in said write data accompanying said write request; receiving a read request specifying an address complying with FBA format to read out data stored in said storage unit from said second computer via said second interface; and transferring said data portion to said second computer via said second interface.