While tape stats were being implemented in the kernel I started working on a program that would read them out and display the data to allow me to test the interface. After the changes were available in linux-next I worked with the upstream sysstat maintainer to get that code into shape so it was suitable for inclusion into sysstat. The latest version of sysstat on github now contains the tapestat command:
https://github.com/sysstat/sysstat New tarballs will be available from the sysstat homepage soon. Some example output (this is the only format) while using the dd command to copy a tape from a slow tape drive to a fast one (DDS to LTO): Tape: r/s w/s kB_read/s kB_wrtn/s %Rd %Wr %Oa Rs/s Ot/s st0 0 523 0 5230 0 14 14 0 0 st1 523 0 5230 0 83 0 83 0 0 Tape: r/s w/s kB_read/s kB_wrtn/s %Rd %Wr %Oa Rs/s Ot/s st0 0 406 0 4060 0 11 11 0 0 st1 406 0 4060 0 86 0 86 0 0 Tape: r/s w/s kB_read/s kB_wrtn/s %Rd %Wr %Oa Rs/s Ot/s st0 0 318 0 3181 0 8 8 0 0 st1 318 0 3182 0 90 0 90 0 0 I want to thank everyone who provided advice, feedback, or helped me get tape stats to this point - especially Sebastien who was a pleasure to work with. Thanks Shane -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
