US 11,853,554 B2
Aligned and unaligned data deallocation
Galya Utevsky, Petah Tiqwa (IL); Marina Frid, Jerusalem (IL); and Igor Genshaft, Bat Yam (IL)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Apr. 5, 2022, as Appl. No. 17/713,736.
Prior Publication US 2023/0315296 A1, Oct. 5, 2023
Int. Cl. G06F 3/06 (2006.01); G06F 12/02 (2006.01); G06F 12/0875 (2016.01)
CPC G06F 3/0611 (2013.01) [G06F 3/0659 (2013.01); G06F 3/0679 (2013.01); G06F 12/0246 (2013.01); G06F 12/0875 (2013.01); G06F 2212/1024 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A data storage device, comprising:
a memory device; and
a controller coupled to the memory device, wherein the controller is configured to:
receive a deallocation command corresponding to a plurality of deallocation requests, wherein each of the plurality of deallocation requests corresponds to a logical block address (LBA) range;
determine that at least one of the plurality of deallocation requests is an unaligned deallocation request;
generate a tag for metadata for the unaligned deallocation request, wherein the tag for the metadata comprises a direction bit and a length bit;
concatenate the metadata including the tag to an LBA range of the unaligned deallocation request; and
complete the deallocation command using the metadata including the tag.