Commit | Line | Data |
---|---|---|
05545c92 SS |
1 | What: /sys/class/scsi_tape/*/stats/in_flight |
2 | Date: Apr 2015 | |
3 | KernelVersion: 4.2 | |
4 | Contact: Shane Seymour <shane.seymour@hp.com> | |
5 | Description: | |
6 | Show the number of I/Os currently in-flight between the st | |
7 | module and the SCSI mid-layer. | |
8 | Users: | |
9 | ||
10 | ||
11 | What: /sys/class/scsi_tape/*/stats/io_ns | |
12 | Date: Apr 2015 | |
13 | KernelVersion: 4.2 | |
14 | Contact: Shane Seymour <shane.seymour@hp.com> | |
15 | Description: | |
16 | Shows the total amount of time spent waiting for all I/O | |
17 | to and from the tape drive to complete. This includes all | |
18 | reads, writes, and other SCSI commands issued to the tape | |
19 | drive. An example of other SCSI commands would be tape | |
20 | movement such as a rewind when a rewind tape device is | |
21 | closed. This item is measured in nanoseconds. | |
22 | ||
23 | To determine the amount of time spent waiting for other I/O | |
24 | to complete subtract read_ns and write_ns from this value. | |
25 | Users: | |
26 | ||
27 | ||
28 | What: /sys/class/scsi_tape/*/stats/other_cnt | |
29 | Date: Apr 2015 | |
30 | KernelVersion: 4.2 | |
31 | Contact: Shane Seymour <shane.seymour@hp.com> | |
32 | Description: | |
33 | The number of I/O requests issued to the tape drive other | |
34 | than SCSI read/write requests. | |
35 | Users: | |
36 | ||
37 | ||
38 | What: /sys/class/scsi_tape/*/stats/read_byte_cnt | |
39 | Date: Apr 2015 | |
40 | KernelVersion: 4.2 | |
41 | Contact: Shane Seymour <shane.seymour@hp.com> | |
42 | Description: | |
43 | Shows the total number of bytes requested from the tape drive. | |
44 | This value is presented in bytes because tape drives support | |
45 | variable length block sizes. | |
46 | Users: | |
47 | ||
48 | ||
49 | What: /sys/class/scsi_tape/*/stats/read_cnt | |
50 | Date: Apr 2015 | |
51 | KernelVersion: 4.2 | |
52 | Contact: Shane Seymour <shane.seymour@hp.com> | |
53 | Description: | |
54 | Shows the total number of read requests issued to the tape | |
55 | drive. | |
56 | Users: | |
57 | ||
58 | ||
59 | What: /sys/class/scsi_tape/*/stats/read_ns | |
60 | Date: Apr 2015 | |
61 | KernelVersion: 4.2 | |
62 | Contact: Shane Seymour <shane.seymour@hp.com> | |
63 | Description: | |
64 | Shows the total amount of time in nanoseconds waiting for | |
65 | read I/O requests to complete. | |
66 | Users: | |
67 | ||
68 | ||
69 | What: /sys/class/scsi_tape/*/stats/write_byte_cnt | |
70 | Date: Apr 2015 | |
71 | KernelVersion: 4.2 | |
72 | Contact: Shane Seymour <shane.seymour@hp.com> | |
73 | Description: | |
74 | Shows the total number of bytes written to the tape drive. | |
75 | This value is presented in bytes because tape drives support | |
76 | variable length block sizes. | |
77 | Users: | |
78 | ||
79 | ||
80 | What: /sys/class/scsi_tape/*/stats/write_cnt | |
81 | Date: Apr 2015 | |
82 | KernelVersion: 4.2 | |
83 | Contact: Shane Seymour <shane.seymour@hp.com> | |
84 | Description: | |
85 | Shows the total number of write requests issued to the tape | |
86 | drive. | |
87 | Users: | |
88 | ||
89 | ||
90 | What: /sys/class/scsi_tape/*/stats/write_ms | |
91 | Date: Apr 2015 | |
92 | KernelVersion: 4.2 | |
93 | Contact: Shane Seymour <shane.seymour@hp.com> | |
94 | Description: | |
95 | Shows the total amount of time in nanoseconds waiting for | |
96 | write I/O requests to complete. | |
97 | Users: | |
98 | ||
99 | ||
100 | What: /sys/class/scsi_tape/*/stats/resid_cnt | |
101 | Date: Apr 2015 | |
102 | KernelVersion: 4.2 | |
103 | Contact: Shane Seymour <shane.seymour@hp.com> | |
104 | Description: | |
105 | Shows the number of times we found that a residual >0 | |
106 | was found when the SCSI midlayer indicated that there was | |
107 | an error. For reads this may be a case of someone issuing | |
108 | reads greater than the block size. | |
109 | Users: |