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109 lines
3.3 KiB
109 lines
3.3 KiB
What: /sys/class/scsi_tape/*/stats/in_flight |
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Date: Apr 2015 |
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KernelVersion: 4.2 |
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Contact: Shane Seymour <[email protected]> |
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Description: |
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Show the number of I/Os currently in-flight between the st |
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module and the SCSI mid-layer. |
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What: /sys/class/scsi_tape/*/stats/io_ns |
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Date: Apr 2015 |
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KernelVersion: 4.2 |
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Contact: Shane Seymour <[email protected]> |
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Description: |
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Shows the total amount of time spent waiting for all I/O |
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to and from the tape drive to complete. This includes all |
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reads, writes, and other SCSI commands issued to the tape |
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drive. An example of other SCSI commands would be tape |
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movement such as a rewind when a rewind tape device is |
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closed. This item is measured in nanoseconds. |
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To determine the amount of time spent waiting for other I/O |
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to complete subtract read_ns and write_ns from this value. |
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Users: |
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What: /sys/class/scsi_tape/*/stats/other_cnt |
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Date: Apr 2015 |
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KernelVersion: 4.2 |
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Contact: Shane Seymour <[email protected]> |
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Description: |
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The number of I/O requests issued to the tape drive other |
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than SCSI read/write requests. |
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Users: |
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What: /sys/class/scsi_tape/*/stats/read_byte_cnt |
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Date: Apr 2015 |
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KernelVersion: 4.2 |
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Contact: Shane Seymour <[email protected]> |
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Description: |
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Shows the total number of bytes requested from the tape drive. |
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This value is presented in bytes because tape drives support |
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variable length block sizes. |
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Users: |
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What: /sys/class/scsi_tape/*/stats/read_cnt |
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Date: Apr 2015 |
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KernelVersion: 4.2 |
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Contact: Shane Seymour <[email protected]> |
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Description: |
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Shows the total number of read requests issued to the tape |
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drive. |
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Users: |
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What: /sys/class/scsi_tape/*/stats/read_ns |
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Date: Apr 2015 |
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KernelVersion: 4.2 |
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Contact: Shane Seymour <[email protected]> |
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Description: |
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Shows the total amount of time in nanoseconds waiting for |
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read I/O requests to complete. |
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Users: |
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What: /sys/class/scsi_tape/*/stats/write_byte_cnt |
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Date: Apr 2015 |
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KernelVersion: 4.2 |
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Contact: Shane Seymour <[email protected]> |
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Description: |
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Shows the total number of bytes written to the tape drive. |
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This value is presented in bytes because tape drives support |
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variable length block sizes. |
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Users: |
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What: /sys/class/scsi_tape/*/stats/write_cnt |
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Date: Apr 2015 |
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KernelVersion: 4.2 |
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Contact: Shane Seymour <[email protected]> |
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Description: |
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Shows the total number of write requests issued to the tape |
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drive. |
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Users: |
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What: /sys/class/scsi_tape/*/stats/write_ms |
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Date: Apr 2015 |
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KernelVersion: 4.2 |
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Contact: Shane Seymour <[email protected]> |
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Description: |
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Shows the total amount of time in nanoseconds waiting for |
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write I/O requests to complete. |
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Users: |
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What: /sys/class/scsi_tape/*/stats/resid_cnt |
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Date: Apr 2015 |
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KernelVersion: 4.2 |
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Contact: Shane Seymour <[email protected]> |
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Description: |
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Shows the number of times we found that a residual >0 |
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was found when the SCSI midlayer indicated that there was |
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an error. For reads this may be a case of someone issuing |
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reads greater than the block size. |
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Users:
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