Patent ID: 8947990
Filing Date: 2015-02-03
Classification: G11B

Abstract:
1. A tape device comprising: a memory; and a processor coupled to the memory, wherein the memory stores management information in which an identifier of a medium and a data volume further recordable on the medium are in association with each other and the processor executes a process comprising: measuring a data volume written in the medium or a data volume read out of the medium according to execution of an input/output command; calculating a data volume recorded on the medium from a total of the data volume measured at the measuring; acquiring a recorded medium length, which represents a length of the medium up to an end position of the data written in or read out of the medium by the execution of the input/output command from a beginning position of the medium, the length of the medium being measured using a position of a head to the medium, from a drive to which the medium is mounted without loading the medium to the drive; calculating the data volume further recordable on the medium, based on the recorded data volume and the recorded medium length; and updating the management information stored in the memory with the data volume further recordable on the medium calculated at the calculating, wherein the measuring includes measuring the data volume written in the medium or the data volume read out of the medium whenever the input/output command is executed.