PMP User Guide v5.5

Using PMP 36
Reduced SCSI speed
The message “At least one drive is running at a reduced SCSI speed on SCSI Port 1” appears in the report. In this
example, the HP ProLiant DL380 server was configured correctly with a new Smart Array controller and Ultra-320
drives, but the drives are not running at Ultra-320 speed. Further examination of the hardware reveals an older SCSI
cable as a potential problem. Testing reveals that the differential pin on the SCSI cable is bad, causing the drive and
controller to revert to SCSI-2 speed for transmission. PMP detected the potential performance problem and helped
narrow the cause before any product work on the server.
Host bus balancing
Although there are no error messages displayed in this static analysis, it is important to note that PMP can help
determine how the devices in a system are laid out across the host buses and what issues might arise from bus
overloading.
Performing Online and Offline Analysis
The following sections provide instructions to use PMP Online and Offline Analysis.
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.
In the previous example, Online Analysis is used to determine that the system required more physical memory to
handle the assigned load balance.
To use Online Analysis, either click the monitored server icon from the Systems Insight Manager PF column, or:
1. From the Systems Insight Manager console toolbar, click Diagnose>Performance Management
Pack>Online Analysis.
2. Select the checkbox next to the server or servers for which to view performance data. The checkbox at the top of
the column can be used to select all of the servers listed on the page.
3. Click Apply Selections>Run Now. Online Analysis appears in a new window.