A system, method and computer program product for accessing host data records stored in a virtual tape storage (VTS) system. The computer program product includes a computer readable storage medium having computer readable program code embodied therewith. The computer readable program code includes computer readable program code configured to receive a mount request to access at least one host data record in a VTS system; computer readable program code configured to determine a starting logical block ID (SLBID) corresponding to the at least one requested host data record; computer readable program code configured to determine a physical block ID (PBID) that corresponds to the SLBID; computer readable program code configured to access a physical block on a magnetic tape medium corresponding to the PBID; and computer readable program code configured to output at least the physical block without outputting an entire logical volume that the physical block is stored to.