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如果您在与系统开发工程师交谈中提到SCSI,他们很可能会批评SCSI的性能、很短的传输距离以及有限的连接能力.但是,这些批评的根据只是对物理层而言,如果从SCSI整个通信协议来看则大谬不然.为了克服这些局限性,SCSI必须用新的串行物理层来取代它当前的并行物理层.这将使SCSI能够继续利用它在软件和固件开发中已作出的投资.Fi-bre Channel(FC,即光纤通道)提供了这样的物理层.这是一个串行通信标准,允许在铜线或光纤上实现几MbpS至1GbpS的数据传输速度.由于SCSI命令集可以变换到FC,所以FC常被称为SCSI的替代技术. FC标准的采用使SCSI的软件和固件.投资得到保护,因此,FC应当被叫做SCSI的新物理层.不仅如此,它还使设计人员可以增加更多的SCS设备.最新的SCSI标难最多支持16个节点,但SCSI可以通过FC访问1,600万个节点,这就保证了寻址能力不再是一个问题或限制因素.
If you talk about SCSI in conversations with system development engineers, they are likely to criticize SCSI performance, short transmission distances, and limited connectivity, but the basis for these criticisms is only for the physical layer, In order to overcome these limitations, SCSI must replace its current parallel physical layer with a new serial physical layer, which will allow SCSI to continue leveraging what it has already invested in software and firmware development. The Fi-Bre Channel (FC) provides a physical layer that is a serial communication standard that allows data transfer speeds of a few MbpS to 1 GbpS over copper or fiber, since the SCSI command set can be switched to FC, FC is often referred to as an alternative to SCSI. The adoption of the FC standard protects the software and firmware of SCSI, so FCs should be called the new SCSI physical layer. Not only that, but it also allows designers to increase More SCS devices. The latest SCSI standard supports up to 16 nodes, but SCSI can access 16 million via FC. This ensures that addressing is no longer a problem or a limitation.