Computing system and method for controlling storage device

1. A method of controlling a storage device, the storage device including a controller connectable to a host device, and a plurality of nonvolatile memory dies, each of the plurality of nonvolatile memory dies including a plurality of memory blocks, the method comprising:

receiving a write request and first data to be written from the host device, the write request designating a first logical address for identifying the first data and a length of the first data;

in response to receiving the write request, selecting a first writable memory block from among the plurality of memory blocks as a write destination block for the first data, and writing the first data to a first physical storage location in the first writable memory block; and

transmitting to the host device the first logical address and a first physical address, the first physical address being indicative of both of the first writable memory block and the first physical storage location in the first writable memory block to which the first data are written, for updating, by the host device, mapping between each of logical addresses and each of physical addresses of the storage device.

2. The method of claim 1 , further comprising:

receiving from the host device a read request designating the first physical address which is mapped to the first logical address by the host device.

3. The method of claim 1 , further comprising:

copying the first data from a previous physical storage location to a new physical storage location; and

transmitting to the host device the first logical address, a second physical address indicative of the previous physical storage location, and a third physical address indicative of the new physical storage location, and wherein

the host device is configured:

to obtain a current physical address mapped to the first logical address;

to update the mapping such that the third physical address is mapped to the first logical address when the second physical address matches the obtained current physical address; and

to maintain the current physical address without updating the mapping when the second physical address does not match the obtained current physical address.

4. The method of claim 3 , further comprising:

in response to receiving a first command designating the second physical address from the host device, invalidating data corresponding to the second physical address, after the mapping is updated by the host device such that the third physical address is mapped to the first logical address.

5. The method of claim 1 , further comprising:

when the first data are updated data of previous data already written to the storage device, in response to receiving from the host device a first command designating a physical address corresponding to the previous data, invalidating the previous data, after the mapping is updated by the host device such that the first physical address is mapped to the first logical address.

6. The method of claim 1 , further comprising:

when the first data are updated data of previous data already written to the storage device and the previous data are duplicated data referred to by a plurality of logical addresses, in response to receiving from the host device a first command designating a physical address corresponding to the previous data, decrementing a reference count indicative of a number of logical addresses referring to the previous data, after the mapping is updated by the host device such that the first physical address is mapped to the first logical address.

7. The method of claim 6 , wherein

the host device does not maintain the reference count.

8. A method of controlling a storage device, the storage device including a controller connectable to a host device, and a plurality of nonvolatile memory dies, each of the plurality of nonvolatile memory dies including a plurality of memory blocks, the method comprising:

receiving from the host device a read request of first data written to a first memory block, the read request designating a first physical address which is indicative of both the first memory block and a first physical storage location in the first memory block to which the first data are written; and

in response to receiving the read request designating the first physical address, transmitting the first data to the host device without performing a logical-to physical address translation when reading of the first data, wherein

the method further comprises:

copying the first data from a previous physical storage location to a new physical storage location; and

transmitting to the host device a first logical address corresponding to the first data, a second physical address indicative of the previous physical storage location, and a third physical address indicative of the new physical storage location, and wherein

the host device is configured:

to obtain a current physical address mapped to the first logical address;

to update mapping between each of logical addresses and each of physical addresses of the storage device such that the third physical address is mapped to the first logical address when the second physical address matches the obtained current physical address; and

to maintain the current physical address without updating the mapping when the second physical address does not match the obtained current physical address.

9. The method of claim 8 , further comprising:

in response to receiving a first command designating the second physical address from the host device, invalidating data corresponding to the second physical address, after the mapping is updated by the host device such that the third physical address is mapped to the first logical address.