US 12,165,674 B1Granted

Write data management

AssigneeInternational Business Machines Corporation

InventorsSimeon Furrer, Mark Alfred Lantz, Martin Petermann, Ilias Iliadis

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Abstract

Provided are a computer program product, device, system, and method for write data management. In one embodiment, a write management controller calculates an order for writing data and parity blocks of write data code words on tape media in a variable interleaved fashion which ensures a minimum physical longitudinal separation along the length of tape between data and parity blocks of the same code word. The calculated write order information may be provided back to a host or other data source so that the write data is eventually transmitted to the tape drive for writing on tape media in accordance with the calculated write order. In this manner, a minimum physical longitudinal separation along the length of tape between data and parity blocks of the same code word may be achieved to increase the reliability of the data storage.

Claims25

Dependent claims

A computer program product for managing write data for a tape media, wherein the computer program product comprises a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause operations, the operations comprising:

receiving a first list identifying portions of write data code words to be written on the tape media, wherein each code word includes at least one data portion and at least one parity portion related to the at least one data portion of a particular code word;
generating a second list of the portions of write data code words of the first list, including reordering the portions of write data code words of the first list to provide a configurable minimum spatial separation between the at least one data portion and the related at least one parity portion of each code word when written on the tape media;
and
writing on the tape media by a tape drive, the portions of write data code words reordered as a function of the second list to provide an actual physical spatial separation along the tape media between the at least one data portion and the related at least one parity portion of each code word of the second list as a function of the minimum spatial separation.

1 more element

A computer-implemented method, comprising:

receiving a first list identifying portions of write data code words to be written on a tape media, wherein each code word includes at least one data portion and at least one parity portion related to the at least one data portion of a particular code word;
generating a second list of the portions of write data code words of the first list, including reordering the portions of write data code words of the first list to provide a configurable minimum spatial separation between the at least one data portion and the related at least one parity portion of each code word when written on the tape media;
and
writing on the tape media by a tape drive, the portions of write data code words reordered as a function of the second list to provide an actual physical spatial separation along the tape media between the at least one data portion and the related at least one parity portion of each code word of the second list as a function of the minimum spatial separation.

1 more element

A device for managing write data for a tape media, comprising:

at least one processor;
and
a computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause operations, the operations comprising:
receiving a first list identifying portions of write data code words to be written on the tape media, wherein each code word includes at least one data portion and at least one parity portion related to the at least one data portion of a particular code word;
generating a second list of the portions of write data code words of the first list, including reordering the portions of write data code words of the first list to provide a configurable minimum spatial separation between the at least one data portion and the related at least one parity portion of each code word when written on the tape media;
and
writing on the tape media by a tape drive, the portions of write data code words reordered as a function of the second list to provide an actual physical spatial separation along the tape media between the at least one data portion and the related at least one parity portion of each code word of the second list as a function of the minimum spatial separation.

4 more elements

Dependencies are inferred from the claim text.