On a write, the DIF is generated by the host bus adapter (HBA), based on the block data and logical block address.
在写数据时，主机总线适配器(HBA)根据块数据和逻辑块地址生成dif。
Because most devices are separated from the CPU by a bus, which is much slower to send data across than it is to write to CPU registers or (cached) memory.
因为大多数设备是分开的CPU总线，慢得多的发送数据跨比写信给CPU寄存器或内存(缓存)。
The data from the sensor gets read back together with all the other bus lines. This process occurs simultaneously with the write process.
从传感器反馈回来的数据在其他的数据总线上重复执行，这个进程和写的进程同时发生。
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