Reduced data access time on tape with data redundancy
AssigneeInternational Business Machines Corporation
InventorKohei Taguchi
Life of this patent
Estimating the term…
Abstract
A computer-implemented method, according to one embodiment, includes: sending an instruction to write a first copy of a first portion of data to a first partition on a first tape, and sending an instruction to write a second copy of the first portion of data to a second partition on a second tape. The first tape has at least the first partition and a second partition, while the second tape also has at least a first partition and the second partition. The first partition on each of the first and second tapes is closer to a beginning of the respective tape than the second partition on the respective tape. The second tape is also different than the first tape.
Claims20
A computer-implemented method, comprising:
- sending an instruction to write a first copy of a first portion of data to a first partition on a first tape, wherein the first tape has at least the first partition and a second partition;
- and
- sending an instruction to write a second copy of the first portion of data to a second partition on a second tape, wherein the second tape is different than the first tape, wherein the second tape has at least a first partition and the second partition,
- wherein the first partition on each of the first and second tapes is closer to a beginning of the respective tape than the second partition on the respective tape.
A computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to:
- send, by the processor, an instruction to write a first copy of a first portion of data to a first partition on a first tape, wherein the first tape has at least the first partition and a second partition;
- and
- send, by the processor, an instruction to write a second copy of the first portion of data to a second partition on a second tape, wherein the second tape has at least a first partition and the second partition,
- wherein the first partition on each of the first and second tapes is closer to a beginning of the respective tape than the second partition on the respective tape.
A computer-implemented method, comprising:
- determining whether a portion of data is located in a first partition of a tape loaded in a tape drive;
- sending an instruction to read the portion of data from the first partition in response to determining that the portion of data is located in the first partition of the tape loaded in the tape drive;
- determining whether the portion of data is located in a second partition of the tape loaded in the tape drive in response to determining that the portion of data is not located in the first partition of the tape loaded in the tape drive;
- and
- sending an instruction to read the portion of data from the second partition in response to determining that the portion of data is located in the second partition of the tape loaded in the tape drive,
- wherein the first partition is closer to a beginning of the tape than the second partition.
Dependencies are inferred from the claim text.