Ratoc USB 2.0 to Ultra SCSI Converter

Ratoc USB 2.0 to Ultra SCSI Converter More Like This The USB 2.0 to Ultra SCSI Converter opens the world of high performance SCSI devices for systems featuring USB 2.0, but no SCSI ports. Attaching the converter to an Ultra SCSI storage device allows it to behave just like a USB 2.0 device. Unlike many competing converters, the converter is Ultra SCSI rather than SCSI II based, so it offers high performance of up to 20 MBps. The converter interfaces with a wide range of SCSI based drives, scanners, CD-ROM, CD-R/W, Zip and other devices. The unit can be used by itself when used in conjunction with SCSI devices that provide power on the SCSI Termination Power output pin. Otherwise, purchase the optional power adapter in addition to the unit. The device's small size and light weight, makes it an excellent choice for mobile uses. For external SCSI devices only.

Part Number and Description Price Add to Cart
USB-USCSI-01 Ratoc USB 2.0 to Ultra SCSI Converter
Ratoc informed us the main controller chip used to make their SCSI products has been discontinued. We're sorry to announce this device is no longer available.
Optional Accessories
PS-5V2A 5VDC 2A External Power Supply/Adapter ST (USB/SCSI) [more info] $23.00 Buy Now
SCSI-RCL3025 High Density 50F to D-Sub 25M Adapter (Ultra to Fast SCSI I/II Mac) [more info] $34.00 Buy Now

Features and Specifications

CE Mark

Vista Compatibility Notes

  • Nearly two times faster than SCSI II adapters, and ten times faster than USB 1.1 to SCSI adapters
  • Connects directly to High Density 50 equipped SCSI devices without a costly SCSI cable
  • Instantly transforms an Ultra SCSI storage device to USB 2.0 device
  • Works great with Jaz, ORB and other portable SCSI drives
  • Easy installation, Plug and Play
Warranty Information
  • 1 Year Limited Warranty
  • 1 USB 2.0 A (upstream) connector
  • 1 Ultra SCSI HD50 connector
  • AC Power adapter connector port
Ultra SCSI Interface
  • Supports up to 20MB/sec. data transfer
  • Supports SBP2 ORB/CDB command set
  • Includes active Ultra SCSI terminator
  • Support Synchronous transfer, Disconnection/Re-connection
  • Works with various SCSI storage devices including: Hard Drives, CD-R/RW, DVD-RAM, MO, Removable Hard Drives
  • HD50P connector works with standard Ultra SCSI, SCSI II, and other HD 50P female SCSI-2 connectors
  • Firmware (Revision 1) currently does not support following functions: SCSI Printer command set, SCSI Scanner command set, Multiple SCSI ID, Multiple LUN
Data transfer rates
  • USB 1.1 Full: 12Mbps
  • USB 2.0 High: 480Mbps
  • Ultra SCSI: 20 MB/sec. max (synchronous)
  • Fast SCSI: 10 MB/sec. max (synchronous)
  • 5 MB/sec. max (asynchronous)
  • Ultra SCSI port works with newer SCSI standards including SCSI 160 and LVD, but transfer rates are limited to 20 Megabytes per second maximum and a connection adapter is needed for devices with HD68, etc.
System requirements
  • PC or Macintosh with USB 2.0 port
  • Windows 98/98SE/Millennium Edition/2000/XP/XPx64
  • Mac OS X 10.2.7 or later, 10.3.x, 10.4.x
SCSI Device requirements
  • High-Density 50P female SCSI-2 connector
  • Term-Power output capability (will work without term-power when used with optional adapter)
  • Single-End interface
Package includes
  • USB 2.0 to Ultra SCSI Converter
  • Windows version includes all necessary drivers, media formatting and configuration utility
  • Macintosh version includes necessary drivers and configuration utility
  • User Guide
Physical Characteristics
  • Dimensions: 51mm x 52mm x 18mm (WDH)
  • Weight: 98g
Operating Environment
  • DC +5VV 300mA (max.) (SCSI termination power out pin voltage is required. Otherwise purchase optional AC adapter)
  • Temperature: 0 to 55 ° C
  • Relative humidity 20-80% (non-condensing)


W3 Document FAQ: Considerations for Ratoc's FireWire and USB 2.0 to SCSI Adapters
Extensive FAQ and important links for Ratoc FireWire and USB 2.0 SCSI products
W3 Document Using Ratoc Devices in The Windows Vista
Compatibility chart, driver data, and information for Ratoc products and the Windows Vista

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