Device Statistics Window

The Device Statistics window, shown in Figure 4-11, displays a "snap-shot" of statistical information about a specific metadevice or physical disk. There are two ways to display this window:

• Select a metadevice on the Metadevice Editor window's canvas, or a disk on the Disk View canvas, by pointing to it and pressing the SELECT button. Select Statistics from the Object menu.

• Point to a metadevice displayed on the Metadevice Editor window's canvas, or a disk displayed on the Disk View canvas. Press and hold down the MENU button to display the pop-up menu for the metadevice or disk then select the Statistics option.

Figure 4-11 Device Statistics Window

Table 4-6 explains the Device Statistics Window.

Table 4-6 Device Statistics Window Functionality

Field	Functions
Device	This field displays the device name, for example, d63.
Info	This button brings up the device's Information window.
Raw Thruput	This information displays reads, writes, total reads and writes, averaged per second.
Derived Values	This information displays average wait queue length, average service time, wait probability, and load.
Add Device to Statistics Graphs Window	This button adds the device to the Statistics Graphs window. The graph area is blank until you select which statistics to graph. The default is Percent Busy.
Update	This button presents a new snap-shot of the statistical information.