Displaying tape device statistics

Why to display tape drive statistics

It can be helpful to display tape device statistics to understand tape performance and check usage patterns. You can zero out the statistics reading and restart the process of displaying the statistics whenever you want.

How to display tape drive statistics

To display the statistics for a specified tape device, complete the following step.

Step	Action
1	Enter the following command: storage stats tape tape tape is the name of a tape device.

Example

storage stats tape nrst0l

Example of the output of the storage stats tape command

The following example shows the statistics for the tape device nrst01.

filerA> storage stats tape nrst0l

Bytes Read: 71471104

Bytes Written: 382147584

Command        Num issued  Max (ms)  Min (ms)  Avg (ms)

-------        ----------  --------  --------  --------

WRITE - Total         2518      1927         2        24  6269 KB/s

   44-48KB             897       372         2         6  6531 KB/s

   60-64KB             421      1927         3        13  4796 KB/s

   128-132KB           800       131         8        19  6761 KB/s

   508KB+              400       481        32        83  6242 KB/s

READ - Total          1092      1570         5        14  4582 KB/s

   60-64KB              92      1390         5        25  2493 KB/s

   64-68KB            1000      1570         5        13  4958 KB/s

WEOF                     5      2827      2787      2810

FSF                      1     13055     13055     13055

BS                       0         0         0         0

FSR                      2      1390         5       697

BSR                      1        23        23        23

REWIND                   9     67606        94     22260

ERASE                    0         0         0         0

EOM                      1     63223     63223     63223

How to zero out tape drive statistics

To zero out the statistics so that only new tape device statistics beginning from the time this command is entered will be displayed the next time you enter the command, complete the following step.

Step	Action
1	Enter the following command: storage stats tape zero tape tape is the name of a tape drive.

Example

storage stats tape zero nrst0l