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2. Seagate FreeAgent - Wikipedia

   en.wikipedia.org/wiki/Seagate_FreeAgent

   The Go Special Edition is the same as the regular Go but with a different case. All the drives support USB 2.0, and the Xtreme also has 2 FireWire 400 ports and an eSATA port. Mac versions of the drives have different designs and supporting FireWire 800, 400 and USB 2.0: the FreeAgent Go for Mac, FreeAgent Desk for Mac and the FreeAgent Go Pro ...

3. eSATAp - Wikipedia

   en.wikipedia.org/wiki/ESATAp

   On a desktop computer the port is simply a connector, usually mounted on a bracket at the back accessible from outside the machine, connected to motherboard sources of SATA, USB, and power at 5 V and 12 V. No change is required to drivers, registry or BIOS settings and the USB support is independent of the SATA connection. [citation needed]

4. USB 3.0 - Wikipedia

   en.wikipedia.org/wiki/USB_3.0

   A factor affecting the speed of USB storage devices (more evident with USB 3.0 devices, but also noticeable with USB 2.0 ones) is that the USB Mass Storage Bulk-Only Transfer (BOT) protocol drivers are generally slower than the USB Attached SCSI protocol (UAS[P]) drivers. [48] [49] [50] [51]

5. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   When adding USB device response time, delays from the maximum number of hubs added to the delays from connecting cables, the maximum acceptable delay per cable amounts to 26 ns. [38] The USB 2.0 specification requires that cable delay be less than 5.2 ns/m (1.6 ns/ft, 192 000 km/s), which is close to the maximum achievable transmission speed ...

6. USB Attached SCSI - Wikipedia

   en.wikipedia.org/wiki/USB_Attached_SCSI

   USB 3.0 SuperSpeed – host controller (xHCI) hardware support, no software overhead for out-of-order commands; USB 2.0 High-speed – enables command queuing in USB 2.0 drives; Streams were added to the USB 3.0 SuperSpeed protocol for supporting UAS out-of-order completions USB 3.0 host controller (xHCI) provides hardware support for streams

7. USB communications - Wikipedia

   en.wikipedia.org/wiki/USB_communications

   The written USB 3.0 specification was released by Intel and its partners in August 2008. The first USB 3.0 controller chips were sampled by NEC in May 2009, [4] and the first products using the USB 3.0 specification arrived in January 2010. [5] USB 3.0 connectors are generally backward compatible, but include new wiring and full-duplex operation.