ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,430,037, issued on Sept. 30, was assigned to Sandisk Technologies Inc. (Milpitas, Calif.).

"Illusory free data storage space in data storage devices" was invented by Kyoungil Kim (San Jose, Calif.) and Hongmei Xie (Sunnyvale, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Data storage devices having the same capacity but with a different number of spare blocks and a different number of unusable blocks may cause device-to-device performance variance. This variance may be minimized by using illusory free blocks for relocation while using actual free blocks for other operations. In this regard, each data storage device having the same storage capac...