All SCSI commands should begin with an operation code as the first byte. This indicates what operation it represents.
所有scsi命令都要以操作代码的第一个字节为开端，以表明它所代表的操作。
The include module provides named constants for each IO operation code (i.e. QrnOperation_OPEN, QrnOperation_CHAIN, etc).
这个include模块为每个IO操作码提供一个已命名常量（即 QrnOperation_OPEN、QrnOperation_CHAIN，等等）。
The CDB contains an operation code defining the particular operation to perform and a number of operation-specific parameters.
CDB包含了用来定义要执行的特定操作的操作代码，以及大量特定于操作的参数。
This program accepts an operation code and a record key as inputs, then reads the VSAM dataset and returns the record back to CICS.
这个程序接受一个操作码和一个记录键作为输入，然后读取VSAM数据集并将记录返回给CICS。
This program accepts an operation code and a record key as inputs, then reads the VSAM dataset and returns the record back to CICS.
这个程序接受一个操作码和一个记录键作为输入，然后读取VSAM数据集并将记录返回给CICS。
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