Patent ID: 11914883
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A computer program product for a copying operation, the computer program product comprising:
one or more computer readable storage media; and
program instructions stored on the one or more computer readable storage media, the program instructions comprising:
program instructions to receive a copy operation, wherein the copy operation is of one or more files stored on a linear tape file system;

program instructions to generate an extent reverse lookup table for the one or more files by organizing unit of extents corresponding to the one or more files as a list of units of extents using an index of the linear tape file system, the list of units of extents being sorted out in an order of block positions on the linear tape file system;
program instructions to determine a next unprocessed unit of extent;
program instructions to read metadata of the next unprocessed unit of extent from the extent reverse lookup table; and
program instructions to perform the copy operation in units of extents of the one or more files based on the extent reverse lookup table.