How to Logically Disconnect a USB Device Subtree
Use this procedure to disconnect a USB device subtree, which is the
hierarchy (or tree) of devices below a hub.
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Become superuser.
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Remove a USB device subtree.
# cfgadm -c disconnect -y usb0/4
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Verify that the USB device subtree is disconnected.
# cfgadm usb0/4
Ap_Id Type Receptacle Occupant Condition
usb0/4 unknown disconnected unconfigured ok
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