Onnto 2.5" SATA HDD Enclosure User Manual page 11

Notes:
• Any cable (eSATA, FireWire, or USB 2.0) inserted before the enclosure is
powered on has priority over the other cables and will be the primary
connection method, i.e.: If the enclosure is connected via FireWire 800
before powering on the enclosure, data will be transferred via
FireWire800.
• The enclosure should only be connected to a computer via one interface
at a time. Connection of the enclosure to a computer via two or more
interfaces is not recommended.
• The enclosure supports FireWire bus power. The enclosure can be
powered via the FireWire bus without use of an AC adapter.
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