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US 12,087,331 B2Granted
Retaining high resolution tape directory in overwritten end of data set
AssigneeInternational Business Machines Corporation
InventorTsuyoshi Miyamura
Life of this patent
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Abstract
An End of Data Set (EOD) including a High Resolution Tape Directory (HRTD) is written at a position next to a last written user data set on a tape. When appending a new user data set, the new user data set is written starting from a position next to an end longitudinal position (LPOS) of the EOD to generate an overwritten EOD.
Claims20
A method comprising:
- writing, at a position next to a last written user data set on a tape, an End of Data Set (EOD) including a High Resolution Tape Directory (HRTD);
- and
- writing, when appending a new user data set, the new user data set starting from a position next to an end longitudinal position (LPOS) of the EOD to generate an overwritten EOD.
A tape drive comprising:
- a memory;
- and
- a controller communicatively coupled to the memory, the controller configured to:
- write, at a position next to a last written user data set on a tape, an End of Data Set (EOD) including a High Resolution Tape Directory (HRTD);
- and
- write, when appending a new user data set, the new user data set starting from a position next to an end longitudinal position (LPOS) of the EOD to generate an overwritten EOD.
3 more elements
A computer program product comprising a computer readable storage medium having code embodied therewith, the code executable by a controller to cause the controller to:
- write, at a position next to a last written user data set on a tape, an End of Data Set (EOD) including a High Resolution Tape Directory (HRTD);
- and
- write, when appending a new user data set, the new user data set starting from a position next to an end longitudinal position (LPOS) of the EOD to generate an overwritten EOD.
Dependencies are inferred from the claim text.