US 11,853,565 B2
Support higher number of active zones in ZNS SSD
Ravishankar Surianarayanan, Bangalore (IN)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Oct. 1, 2021, as Appl. No. 17/492,224.
Prior Publication US 2023/0103355 A1, Apr. 6, 2023
Int. Cl. G06F 3/06 (2006.01)
CPC G06F 3/0631 (2013.01) [G06F 3/064 (2013.01); G06F 3/0613 (2013.01); G06F 3/0644 (2013.01); G06F 3/0652 (2013.01); G06F 3/0673 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A data storage device, comprising:
a memory device having a plurality of superblocks and a plurality of dies, wherein:
each of the plurality of dies comprises a plurality of blocks; and
each superblock of the plurality of superblocks comprises at least one block of the plurality of blocks from each of the plurality of dies of the memory device; and
a controller coupled to the memory device, the controller configured to:
allocate two or more zones to a first superblock of the plurality of superblocks, wherein a zone is distinct from a superblock, and wherein the zone is either explicitly opened or implicitly opened by a host device through a command received from the host device, wherein implicitly opened is in response to an implicit request from the host device that does not include a zone open command, and wherein explicitly opened is in response to a request from the host device that includes a zone open command.