The second image shows the back side of the external hard drive case with the USB cable connected to the enclosure. On that same PCB is the UDISK bridge chip which does the protocol translation. This bridge chip (UDISK) changes the hard from from IDE protocol (or SATA protocol) to a USB protocol.Įxamine the picture a bit closer and you can clearly see the SATA interface on the PCB. A magnetic hard drive typically has an IDE or SATA connection interface and a UDISK chip is used to bridge the IDE (or) SATA interface to that of USB. The technical term for UDISK is a bridge chip which is used inside an enclosure to turn a hard drive into an external storage device that connects via USB cable.įor example, in the picture below is a hard drive enclosure which is designed to hold a magnetic hard drive and turn the hard drive into an external storage device.
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