Storage controller managing different types of blocks, operating method thereof, and operating method of storage device including the same

A storage controller comprising:

• processing circuitry configured to
• change a state of a target zone of a plurality of zones of a zoned namespace (ZNS) depending on a request of a host, the request including
• an address indicating the target zone, and
• a command to transition from an empty state with no assigned memory blocks to an implicitly opened (ZSIO) state or an explicitly opened (ZSEO) state of the ZNS,
• assign a first memory block of a plurality of memory blocks in a non-volatile memory device to the target zone in response to the changed state of the target zone being an active state;
• and
• a buffer memory configured to store target data corresponding to the request of the host in the first memory block,
• wherein the first memory block is higher in reliability than a second memory block assigned to a zone having a non-active state from among the plurality of zones.

An operating method of a storage device which communicates with a host, the method comprising,

• receiving a first request from the host, the first request including
• an address indicating a first zone of a plurality of zones of a zoned namespace (ZNS), and
• a command to transition to an implicitly opened (ZSIO) state or an explicitly opened (ZSEO) state of the ZNS;
• setting a state of the first zone from an empty state with no assigned memory blocks to an active state in response to the first request;
• assigning a first memory block of a plurality of memory blocks of a non-volatile memory device to the first zone updated to the active state;
• and
• storing user data corresponding to the first request in the first memory block,
• wherein the first memory block is higher in reliability than a second memory block assigned to a second zone having a non-active state from among the plurality of zones.