HP Xw460c HP Insight Control Environment User Guide - Page 62

Reduced SCSI speed, Host bus balancing, Performing Online Analysis

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Reduced SCSI speed The next message in the report that might indicate a problem is At least one drive is running at a reduced SCSI speed on SCSI Port 1. In this example, the HP ProLiant DL380 server was configured correctly with a new Smart Array controller and Ultra320 drives, but the drives are not running at Ultra320 speed. Further examination of the hardware might reveal an older SCSI cable as a potential problem. Testing might reveal that the differential pin on the SCSI cable is bad, causing the drive and controller to revert to SCSI-2 speed for transmission. PMP detects the potential performance problem and helps narrow the cause before any product work is done on the server. Host bus balancing Although no error messages appear in this static analysis, PMP can determine how the devices in a system are laid out across the host buses and what issues might arise from bus overloading. Performing Online Analysis The PMP Online Analysis tool enables performance data to be viewed from a real-time data stream and provides an intuitive interface to detail the performance status and inventory of monitored servers and their components. Online Analysis is used to determine that the system required more physical memory to handle the assigned load balance. To use Online Analysis, choose either of the following options: 1. From the Systems Insight Manager PF column, click the monitored server icon. 2. Perform the following steps: 62 Monitoring and controlling servers

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Reduced SCSI speed
The next message in the report that might indicate a problem is
At least one drive is running
at a reduced SCSI speed on SCSI Port 1
. In this example, the HP ProLiant DL380 server was
configured correctly with a new Smart Array controller and Ultra320 drives, but the drives are not running
at Ultra320 speed. Further examination of the hardware might reveal an older SCSI cable as a potential
problem. Testing might reveal that the differential pin on the SCSI cable is bad, causing the drive and
controller to revert to SCSI-2 speed for transmission. PMP detects the potential performance problem and
helps narrow the cause before any product work is done on the server.
Host bus balancing
Although no error messages appear in this static analysis, PMP can determine how the devices in a system
are laid out across the host buses and what issues might arise from bus overloading.
Performing Online Analysis
The PMP Online Analysis tool enables performance data to be viewed from a real-time data stream and
provides an intuitive interface to detail the performance status and inventory of monitored servers and their
components.
Online Analysis is used to determine that the system required more physical memory to handle the assigned
load balance.
To use Online Analysis, choose either of the following options:
1.
From the Systems Insight Manager PF column, click the monitored server icon.
2.
Perform the following steps:
62
Monitoring and controlling servers