Data storage device and method for performing error recovery

A method for performing error recovery, applied in an error recovery procedure performed by a signal processing circuit when an error has occurred in a data storage device, comprising:

• transmitting a first predetermined request signal to a peer device to try to trigger a first signal handshake procedure;
• performing an operation of periodic line reset to repeatedly transmit a line reset signal to the peer device within a predetermined period when determining that the first signal handshake procedure has failed;
• transmitting a second predetermined request signal to the peer device to try to trigger a second signal handshake procedure when determining that the line reset signal has been received by the peer device;
• and
• determining that error recovery is successful when the second signal handshake procedure is determined successful.