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 second byte of "01" indicates that this is a private key operation (e.g. it's a signature).
第二个字节“01”说明这是一个私钥操作(如，它是一个签名)。
The C# client code in Listing 4 loads an image from the file system and sends it to the server through the available sendImage(byte[] i) operation.
在 清单 4 中 C# 客户端代码从文件系统装载一个图像，然后通过 sendImage(byte[] i) 操作把它发送给服务器。
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