7.4 UX Disk

The UX Disk object provides counters for monitoring the physical disk activity on UNIX systems. On Solaris, the _Total instance includes cdrom in calculating counter values.

For counters that accept a disk instance, physical disk names for a computer are available in the Operator Console. For example, to monitor the percentage of time fixed disk 1 (device fd1) is busy reading or writing, type:

UX Disk|%Time Disk Busy|fd1

To monitor a counter for all disks instead of a particular disk, such as the average number of KBs written per second, use the _Total instance and type:

UX Disk|Kilobytes Write/s|_Total

The following table describes the counters for the UX Disk object.

Counter Name

Description

Platforms

Kilobytes Read/s

Average number of kilobytes transferred from the disk per second during read operations. For all platforms, specify one of the following as the instance:

  • a physical disk name

  • _Total (for all instances).
  • AIX
  • Linux
  • Solaris

Kilobytes Write/s

Average number of kilobytes transferred to the disk per second during write operations. For all platforms, specify one of the following as the instance:

  • a physical disk name

  • _Total (for all instances).
  • AIX
  • Linux
  • Solaris

Average Wait Service Time/ms

Average amount of time in milliseconds that disk requests are waiting. For either platform, specify one of the following as the instance:

  • a physical disk name

  • _Total (for all instances).
  • HP-UX
  • Solaris

Average Run Service Time/ms

Average amount of time in milliseconds that disk operations are occurring. For all platforms, specify one of the following as the instance:

  • a physical disk name

  • _Total (for all instances).
  • HP-UX
  • Linux
  • Solaris

Average Service Time/ms

Average amount of time in milliseconds for a disk operation to complete. This counter represents the sum of the wait time and the run time. For either platform, specify one of the following as the instance:

  • a physical disk name

  • _Total (for all instances).
  • HP-UX
  • Solaris

Average # of Trans. Waiting

Average number of transfers waiting to occur. Specify one of the following as the instance:

  • a physical disk name

  • _Total (for all instances).

HP-UX

%Time Trans. Waiting

Percentage of time that a transfer is waiting to occur. Specify one of the following as the instance:

  • a physical disk name

  • _Total (for all instances).

HP-UX

%Time Disk Busy

Percentage of time that the disk is physically reading or writing. For either platform, specify one of the following as the instance:

  • a physical disk name

  • _Total (for all instances).
  • AIX
  • HP-UX