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