HP NetRAID-4M Controller - Manual (Page 48)

3-24
Command Line Interface User’s Guide
Displaying a Channel’s Speed
The channel speed attribute indicates the speed at which a
channel is operating. If drives other than Ultra-2 are present on the
system, the entire channel is limited to UltraWide.
To display the speed of a channel, use the controller show
channels command, as in the following example. In the example,
the Max Usage column indicates a maximum speed of NoInfo for
channel 0. NoInfo indicates that this information is not available.
HPN0> controller show channels
Executing: controller show channels
Ch# Host ID Targets Type Max Usage
--- ------- ------- --------- ---------
0 7 15 NoInfo NoInfo
Resetting a Channel
Resetting a channel verifies the presence of the currently connected
devices, and recognizes new devices added to the channel.
To reset the channel, use the controller reset_scsi_channel
command, as in the following example. In the example, the SCSI
channel is reset on channel 1.
HPN0> controller reset_scsi_channel 1
Executing: controller reset_scsi_channel 1
Understanding Batteries
The HPN0 controller’s battery preserves the contents of its
nonvolitile cache memory in the event of power loss. Power loss can
occur due to a sudden interruption of power to the server or
whenever the server is powered down for maintenance and upgrade
tasks. See your controller installation guide for detailed information
regarding the characteristics of your controller’s battery
Battery attributes indicate the characteristics of a controller’s battery
that you can administer or display using the CLI. Table 3-3 lists the
battery attributes and related CLI commands.