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Ports
G_Port. This displays if nothing is logged into the port and the port is configured to be a G_Port.
F_Port. This displays if a device is logged into the port.
E_Port. This displays if the port is connected to another switchs E_Port through an ISL.
GX_Port. Valid only on loop devices, allows a port to operate as either a Fabric Loop Port, Fabric Port, or an Expansion Port.  This displays if nothing is logged into the port and the port is configured to be a GX_Port.
FX_Port. Valid only on loop devices. This setting restricts a port to operate as either a Fabric Loop Port or a Fabric Port.

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OSI layers
	7-6
	4 = FC-4 ULP-FCP
	3 = FC-3 services,encryption
	2 = FC-2 framing, flowcontrol 1 = FC-1 encoding, linkcontrol
	    FC-0 physical

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data flow through san

application
kernel (interface)
file system
file system memory cache
kernel
VM or virtualization agent
abstraction layer storing device driver (storage command interpreter mostly)
low-level device driver (physical connection)
system memory bus
system I/O bus
HBA wiring including any virtualization operators in the path
subsystem controller
subsystem cache (optional)
subsystem internal connectivity
device controller
device buffer memory
device media

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No SAN
            App patches
            OS patches
            Security patches
            System firmware
            HBA firmware
            Local harddrive firmware
            IP Network switch firmware

With SAN
            App patches
            OS patches
            Security patches
            System firmware
            HBA firmware
            Local harddrive firmware
            Switch fabric firmware
            Frame firmware
            Frame harddrive firmware
            IP Network firmware

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