Storage controller, storage device, and operation method of storage device

An operation method of a storage device including a storage controller and a non-volatile storage device includes performing a first boot operation, performing a first training on a plurality of data signals such that a detection operation of the first training is repeatedly performed on a window of the data signals, storing offset information generated based on a result of the first training, performing a normal operation based on a result of the first training, performing a second startup operation, performing a second training on the plurality of data signals based on offset information generated in the first training such that a detection operation of the second training is repeatedly performed on a left edge section and a right edge section of a window of the data signals, and performing a normal operation based on a result of the second training. 一种包括存储控制器和非易失性存储设备的存储设备的操作方法，包括：执行第一启动操作，对多个数据信号执行第一训练，使得对数据信号的窗口重复执行第一训练的检测操作，存储基于第一训练的结果生成的偏移信息，基于第一训练的结果执行正常操作，执行第二启动操作，基于在第一训练中生成的偏移信息对多个数据信号执行第二训练，使得对数据信号