Partition misaligned - Linux
By Andy
at 2010-04-25T14:20
at 2010-04-25T14:20
Table of Contents
你的硬碟sector
- - - - - - - -|- - - - - - - -|- - - - - - - -|- - - - - - - -|- - - - - - - -
你的FS sector(如果也是4k)有對齊
- - - - - - - -|- - - - - - - -|- - - - - - - -|- - - - - - - -|- - - - - - - -
fileA: - - - - - - -
讀出: - - - - - - - - 讀一次會讀出一個硬體sector
FS sector如果沒有對齊
|- - - - - - - -|- - - - - - - -|- - - - - - - -|
fileA: - - - - - - -
讀出: - - - - - - - -|- - - - - - - -
讀一次要讀出二個硬體sector 就變慢了
可是fdisk平常會用16065(=/=8*n)sector/track 所以fs的開頭沒有和
硬體sector對齊 這就是他說的 "沒有對齊"
至於解決辦法.... 去找google大神吧 XD
我會把sector start放在第8n+1track
--
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Linux
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