HP StorageWorks 16-EL Fabric OS V3.1.1C Release Notes - Page 8
HP recommendations for redundant fabrics and drivers, Changing Compatibility Mode settings
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HP recommendations for redundant fabrics and drivers HP recommendations for redundant fabrics and drivers HP always recommends redundant fabrics and multi-pathing software for uptime-sensitive environments. Examples of scenarios protected by redundant fabrics include, but are not limited to: ■ Add / Move / Change operations for devices or switches ■ Changing the core PID format ■ Changing other fabric-wide parameters (for example, ED_TOV) ■ Erroneous zoning changes / user error ■ Major upgrades / changes to fabric architecture ■ Physical disasters, for example, a water pipe breaks above "fabric A" rack HP recommends strongly against using drivers that bind by PID. There are several routine maintenance procedures which may result in a device receiving a new PID; the core PID format update is just one example of such a procedure. 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, Change type operations) ■ Updating the core PID format ■ Using hot spare switch ports to deal with failures 8 Fabric OS 3.1.1c Release Notes