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1What: /sys/class/scsi_tape/*/stats/in_flight2Date: Apr 20153KernelVersion: 4.24Contact: Shane Seymour <shane.seymour@hp.com>5Description:6 Show the number of I/Os currently in-flight between the st7 module and the SCSI mid-layer.8Users:9 10 11What: /sys/class/scsi_tape/*/stats/io_ns12Date: Apr 201513KernelVersion: 4.214Contact: Shane Seymour <shane.seymour@hp.com>15Description:16 Shows the total amount of time spent waiting for all I/O17 to and from the tape drive to complete. This includes all18 reads, writes, and other SCSI commands issued to the tape19 drive. An example of other SCSI commands would be tape20 movement such as a rewind when a rewind tape device is21 closed. This item is measured in nanoseconds.22 23 To determine the amount of time spent waiting for other I/O24 to complete subtract read_ns and write_ns from this value.25Users:26 27 28What: /sys/class/scsi_tape/*/stats/other_cnt29Date: Apr 201530KernelVersion: 4.231Contact: Shane Seymour <shane.seymour@hp.com>32Description:33 The number of I/O requests issued to the tape drive other34 than SCSI read/write requests.35Users:36 37 38What: /sys/class/scsi_tape/*/stats/read_byte_cnt39Date: Apr 201540KernelVersion: 4.241Contact: Shane Seymour <shane.seymour@hp.com>42Description:43 Shows the total number of bytes requested from the tape drive.44 This value is presented in bytes because tape drives support45 variable length block sizes.46Users:47 48 49What: /sys/class/scsi_tape/*/stats/read_cnt50Date: Apr 201551KernelVersion: 4.252Contact: Shane Seymour <shane.seymour@hp.com>53Description:54 Shows the total number of read requests issued to the tape55 drive.56Users:57 58 59What: /sys/class/scsi_tape/*/stats/read_ns60Date: Apr 201561KernelVersion: 4.262Contact: Shane Seymour <shane.seymour@hp.com>63Description:64 Shows the total amount of time in nanoseconds waiting for65 read I/O requests to complete.66Users:67 68 69What: /sys/class/scsi_tape/*/stats/write_byte_cnt70Date: Apr 201571KernelVersion: 4.272Contact: Shane Seymour <shane.seymour@hp.com>73Description:74 Shows the total number of bytes written to the tape drive.75 This value is presented in bytes because tape drives support76 variable length block sizes.77Users:78 79 80What: /sys/class/scsi_tape/*/stats/write_cnt81Date: Apr 201582KernelVersion: 4.283Contact: Shane Seymour <shane.seymour@hp.com>84Description:85 Shows the total number of write requests issued to the tape86 drive.87Users:88 89 90What: /sys/class/scsi_tape/*/stats/write_ms91Date: Apr 201592KernelVersion: 4.293Contact: Shane Seymour <shane.seymour@hp.com>94Description:95 Shows the total amount of time in nanoseconds waiting for96 write I/O requests to complete.97Users:98 99 100What: /sys/class/scsi_tape/*/stats/resid_cnt101Date: Apr 2015102KernelVersion: 4.2103Contact: Shane Seymour <shane.seymour@hp.com>104Description:105 Shows the number of times we found that a residual >0106 was found when the SCSI midlayer indicated that there was107 an error. For reads this may be a case of someone issuing108 reads greater than the block size.109Users:110