読取 よみと書込 かきこみヘッドではありませんでした
yomitorikakikomiheddodewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 読取り書込みヘッド

1. Was not a read/write head.; Was not the read/write head.

Past/Perfective
Negative
Polite
Formal Register
Computing