HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide (EK-G80TS-SA. C01, March 2005)

Alternative Controller Operations
273HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide
Tip: The best scenario for operating devices with optimal performance and SCSI
fairness is to use SCSI-3 compliant devices and enable SCSI fairness. If you are unable
to follow this guideline, allow your most active devices to comprise SCSI-3 devices in
the SCSI ID range of 5, 4, 3, and 2, and operate your heaviest load to the drives at
these IDs. Also, avoid placing the I/O load on SCSI-2 devices that are at high priority
IDs. To determine the I/O load per device bus, issue the DISPLAY DEVICES
command from a
VTDPY prompt.