to drchi:
基本上因為越前面越外圈,所以如果您真的經常性的使用到分頁檔,那越前面的磁區應可獲得較佳的效能。甚至,將其放在另外一顆硬碟的磁區或許會再快一點點 (當然該顆的表現起碼也要差不多的等級)。
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關於硬碟讀寫頭是同時移動,例如這個網頁所示:Notes on disk storage:
http://www.stjulians.com/cs/diskstoragenotes.html
As all the heads move in and out across the platters at the same time, they are always positioned in a vertical line. Whatever track one of the heads is over, all the others will be over the same track on their respective platters/surfaces. This gives rise to the logical grouping of these tracks into cylinders.
所以有個專有名詞叫做 cylinder (磁簇 or 磁柱),便是描述這個垂直方向的等效結構,例如下面網頁所示:
http://www.pcguide.com/ref/hdd/geom...fference-c.html
至於一些硬碟讀寫所要用到的定址,可參見 湯姆老爹 的網頁介紹:
IDE教學課程(一):概念與技術深入剖析
http://www.big5.tomshardware.com/st...816/ide-05.html