Internal release for tape operations

WARNING THE PREVIOUS TAG WAS ON THE WRONG BRANCH

TAPE OPERATIONS SHOULD NOT USE 2_1_17_11

This release includes the extension of the SG_IO API to support variable length data buffers.

Internal release for tape operations

WARNING THE PREVIOUS TAG WAS ON THE WRONG BRANCH

TAPE OPERATIONS SHOULD NOT USE 2_1_17_11

This release includes the extension of the SG_IO API to support variable length data buffers.