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Lund Performance Solutions


SOS Disk Controller I/O Summary

The Disk Controller I/O Summary Screen

The Disk Controller I/O Summary screen displays a tabular summary of I/O activity for each disk controller on the system.




Figure 13.1 SOS Disk Controller I/O Summary screen
To access the Disk Controller I/O Summary screen from any SOS display screen:
  • Type s from the SOS Enter command: prompt to view the Screen Selection Menu screen.
  • From the Screen Selection Menu screen, enter r (Disk Controller I/O Summary). The Disk Controller I/O Summary screen will display (refer to Figure 13.1).
  • Disk Controller I/O Summary Screen Display Items

    DISK CONTROLLER I/O SUMMARY

    The data items in the Disk I/O Summary screen are described in the following table.
    Table 13.1 SOS DISK CONTROLLER I/O SUMMARY data items
    Data Item
    Description
    Dev
    N/A
    The device identification number for the disk controller.
    I/O%
    N/A
    The percentage of all disk I/Os on the system performed by each disk controller.
    Phy rt (/s)
    Read
    The number of physical reads/writes per second performed by each disk controller during the interval.
    Write
    User Rt (/s)
    Read
    User reads/writes per second (see "user I/O").
    Write
    Sys Rt (/s)
    Read
    System reads/writes per second (see "system I/O").
    Write
    VM Rt (/s)
    Read
    Virtual memory reads/writes per second (see "virtual memory I/O").
    Write
    Raw Rt (/s)
    Read
    Raw memory reads/writes per second (see "raw I/O").
    Write
    TOTALS
    N/A
    The TOTALS line sums up the activities of all disk controllers for the interval.

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