Memory storage device, method for operating the storage device and method for operating a host device

A method for a memory storage device, the memory storage device comprising:

• a memory controller;
• and
• a non-volatile memory connected to the memory controller, the method comprising:
• receiving, by the memory controller, a command from a host device, the command requesting information about lost LBAs (logical block addresses) lost from a buffer of the memory controller during a system shutdown of the memory storage device,
• in response to the command, providing, by the memory controller, the information about the lost LBAs, and
• receiving, by the memory controller, recovered data corresponding to the lost LBAs based on the information about the lost LBAs,
• wherein the information about the lost LBAs includes at least one of the number of LBAs lost by system shutdown, an LBA list lost by system shutdown, and deletion of a previous LBA list lost by system shutdown,
• wherein:
• the memory controller receives and buffers write data and LBAs from the host device prior to the system shutdown,
• the memory controller creates and stores a bitmap on the basis of the buffered write data and LBAs prior to the system shutdown, and
• the memory controller programs the bitmap and at least some of the buffered write data into the non-volatile memory on the basis of the LBAs during a dumping time due to the system shutdown, the dumping time lasting from the time of system shutdown to a time when a temporary power source is exhausted.