noun
pre-read head
Computing term for a read head that reads data ahead of the current processing position, often used in tape drives or disk systems.
先行読取りヘッドは、テープドライブでデータを先読みするために使われる。
The pre-read head is used in tape drives to read data ahead.
Compound of 先行 (preceding) + 読取り (reading) + ヘッド (head), a calque from English 'pre-read head'.