HDDの回転数は内周、外周によって、重力によっても違うんだけどなー。7200rpmと5x00rpmの違いなら分かる

Default Widget

This is Sidebar 1. You can edit the content that appears here by visiting your Widgets panel and modifying the current widgets in Sidebar 1. Or, if you want to be a true ninja, you can add your own content to this sidebar by using the appropriate hooks.