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US 12,001,405 B2Granted
Tape unmounting protocol
AssigneeInternational Business Machines Corporation
InventorsTohru Hasegawa, Tsuyoshi Miyamura, Atsushi Abe, Shinsuke Mitsuma, Noriko Yamamoto, Sosuke Matsui
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Abstract
Described are techniques for a tape unmounting protocol. The techniques include selecting a tape for unmounting from a plurality of tape drives, where the tape for unmounting includes a remaining capacity below a first threshold and a number of migrated files below a second threshold. The techniques further include unmounting the tape for unmounting from a tape drive.
Claims18
A computer-implemented method comprising:
- accepting a request for copying a file from an unmounted first tape to a primary storage, wherein the accepting comprises:
- determining that the first tape is not mounted on any tape drive;
- and
- determining that each of a plurality of tape drives includes a mounted tape;
- selecting a second tape for unmounting from the plurality of mounted tape drives, wherein the second tape includes a remaining capacity below a first threshold and a number of migrated files below a second threshold;
- unmounting the second tape from a tape drive;
- mounting the first tape on the tape drive;
- and
- performing the request by copying the file from the first tape to the primary storage using the tape drive.
6 more elements
A system comprising:
- one or more processors;
- and
- one or more computer-readable storage media 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:
- accepting a request for copying a file from an unmounted first tape to a primary storage, wherein the accepting comprises:
- determining that the first tape is not mounted on any tape drive;
- and
- determining that each of a plurality of tape drives includes a mounted tape;
- selecting a second tape for unmounting from the plurality of mounted tape drives, wherein the second tape for unmounting includes a remaining capacity below a first threshold and a number of migrated files below a second threshold;
- unmounting the second tape for unmounting from a tape drive;
- mounting the first tape on the tape drive;
- and
- performing the request by copying the file from the first tape to the primary storage using the tape drive.
9 more elements
A computer-implemented method comprising:
- determining that a second tape is not mounted on any tape drive;
- determining that there are no available tape drives of a plurality of tape drives;
- selecting a tape for unmounting from a tape drive, wherein the tape includes a remaining capacity below a first threshold and a number of migrated files below a second threshold;
- unmounting the tape from the tape drive;
- mounting the second tape on the tape drive in response to unmounting the tape from the tape drive;
- and
- copying a file from the second tape to a primary storage using the tape drive.
4 more elements
Dependencies are inferred from the claim text.