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  • Your answer looks like another question. Things are not as simple as you might think. A tar archive is internally structured in units of 512 bytes and written to tape in larger tape block units. In addition, seeking the tape only makes sense for larger distances, while highly optimized TAR implementations like star already introfuced a FIFO 30 years ago and work better for files of small and medium size. Seeking the tape mainly makes sense if you like to speed up the work to approach the first file on interest on a tape. Commented Jan 26, 2020 at 14:09