HP StorageWorks MSA 2/8 HP StorageWorks Fabric OS Procedures V3.1.x/4.1.x User - Page 147

Updating Switches to the Core PID Addressing ■ Detailed Update Procedures for HP/UX and AIX provides examples of step-by-step instructions for certain PID-bound devices. These procedures are applicable to any of a broad class of routine maintenance tasks; indeed, they would apply to these devices in many scenarios with any Fibre Channel switch in any addressing mode. Note: It is recommended not to use drivers that bind by PID. There are several routine maintenance procedures which may result in a device receiving a new PID. Examples include, but are not limited to: ■ Changing "Compatibility Mode" settings ■ Changing switch Domain IDs ■ Merging fabrics ■ Relocating devices to new ports or new switches (that is, for Add, Move, and Change type operations) ■ Updating the core PID format ■ Using hot spare switch ports to deal with failures In every case where devices bind by PID, any such procedure becomes difficult or impossible to execute without downtime. In some cases, device drivers allow the user to manually specify persistent bindings by PID. In these cases, such devices must be identified and an appropriate update procedure created. If possible, the procedure should involve changing from PID binding to WWN binding. Fabric OS Procedures Version 3.1.x/4.1.x User Guide 147