noun
track density
Computing term: the number of data tracks per unit of length on a magnetic disk or similar storage medium.
このハードディスクはトラック密度が高いので、大容量のデータを保存できます。
This hard disk has high track density, so it can store large amounts of data.
Recording density is a broader term that includes both track density and linear bit density.
Compound of English loanword トラック (track) and 密度 (density).