Tape drive repositioning
AssigneeInternational Business Machines Corporation
InventorsTsuyoshi Miyamura, Setsuko Masuda
Life of this patent
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Abstract
Aspects of the present disclosure relate to improved tape repositioning. Information associated with at least one preceding dataset on a tape medium is stored within a dataset information table (DSIT) of a dataset on the tape medium. A repositioning request specifying a target data position is received. The information associated with the at least one preceding dataset within the DSIT of the dataset is referenced while attempting to complete the repositioning request.
Claims17
A method comprising:
- storing, within a dataset information table (DSIT) of a dataset on a tape medium, information associated with at least one preceding dataset on the tape medium, wherein the tape medium includes an updated dataset corresponding to the dataset and stored subsequent to the dataset, the updated dataset written using suspended append write (SAW) and the updated dataset having an updated write pass (WP) counter;
- receiving a repositioning request specifying a target data position;
- and
- referencing the information associated with the at least one preceding dataset within the DSIT of the dataset while attempting to complete the repositioning request.
A system comprising:
- a tape system having a tape medium;
- one or more processors;
- and
- one or more computer-readable storage media collectively storing program instructions which, when executed by the one or more processors, are configured to cause the one or more processors to perform a method comprising:
- storing, within a dataset information table (DSIT) of a dataset on the tape medium, information associated with at least one preceding dataset on the tape medium, wherein the tape medium includes an updated dataset corresponding to the dataset and stored subsequent to the dataset, the updated dataset being written using suspended append write (SAW) and the updated dataset having an updated write pass (WP) counter;
- receiving a repositioning request specifying a target data position;
- and
- referencing the information associated with the at least one preceding dataset within the DSIT of the dataset while attempting to complete the repositioning request.
A computer program product comprising one or more computer readable storage media, and program instructions collectively stored on the one or more computer readable storage media, the program instructions comprising instructions configured to cause one or more processors to perform a method of repositioning within a tape system, the method comprising:
- storing, within a dataset information table (DSIT) of a dataset on a tape medium, information associated with at least one preceding dataset on the tape medium, wherein the tape medium includes an updated dataset corresponding to the dataset and stored subsequent to the dataset, the updated dataset being written using suspended append write (SAW) and the updated dataset having an updated write pass (WP) counter;
- receiving a repositioning request specifying a target data position;
- and
- referencing the information associated with the at least one preceding dataset within the DSIT of the dataset while attempting to complete the repositioning request.
Dependencies are inferred from the claim text.