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Table Of Contents  CertiGuide to A+ (Core Hardware)
 9  Chapter 0110:  Removable Media
      9  IV  CD-ROM
           9  CD-ROM / CD-RW Interfaces

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USB & IEEE-1394

CD-ROM’s and CD-RW’s can also be found as external devices. These can come in real handy for a PC tech that needs to back up data from a client's computer before reformatting a hard drive.

SCSI models are currently the most common interface used, but newer drives are making use of USB and IEEE 1394. The USB interface provides near universal support on new systems. IEEE 1394 interfaces are rarely found integrated into the motherboard and therefore require an expansion card.

The Iomega Predator CD-RW (shown in Figure 77) features an interchangeable interface module. With the USB adapter, it has a 4x4x6 (4x Write, 4x Rewrite, 6x Read) speed, but attaching the IEEE 1394 adapter makes it a 12x10x32. Very cool, and vastly superior to using parallel.


Figure 77: External USB / IEEE 1394 CD-RW

 

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