Apparatus for managing cache loss and operation method thereof

A host for managing a storage device, the host comprising:

• a storage host interface configured to communicate with the storage device comprising a cache and a non-volatile memory;
• and
• at least one processor operatively coupled with the storage host interface,
• wherein the at least one processor is configured to:
• receive information indicating cache loss from the storage device after device reset of the storage device,
• suspend a data input/output operation for the storage device in response to the information indicating cache loss,
• transmit a buffer read command to the storage device, and
• receive, from the storage device, cache information related to data remaining in the cache without being stored in the non-volatile memory before the device reset, based on the buffer read command.