noun
partitioning
Computing term for dividing a storage device or memory into separate sections.
ハードディスクの領域確保を行う。
Partition the hard disk.
メモリの領域確保に失敗した。
Memory partitioning failed.
Common loanword for 'partition' in computing; 領域確保 is a more formal or technical Japanese equivalent.
Compound of 領域 (area, domain) and 確保 (securing, ensuring). The computing sense is a direct extension of the literal meaning.