非蘋果SSD的Trim與Yosemite - MAC
By Oliver
at 2014-10-17T20:12
at 2014-10-17T20:12
Table of Contents
簡單的說,就是現在非蘋果自家的SSD,都沒有Trim能用。
若使用如Trim Enabler或Chameleon SSD Optimizer這類程式強制開啟Trim,
則重開機後就會掛掉(卡在灰螢幕)。
Trim Enabler作者建議:
除非你很有冒險嘗鮮的精神,不然就先放著不要啟動Trim。
以一個收費軟體而言,Trim Enabler應該會有比較完整的解決方案,
在方案出來並且確認可行以前,我覺得還是先觀望一陣子吧!
根據小弟不專業的理解,這個會讓系統掛掉的原因,
是因為在Yosemite裡,蘋果加入了一個kext signing機制,會檢查系統核心有無被修改過
而偏偏為了讓非蘋果SSD能夠啟用Trim,就得去修改IOAHCIFamily.kext
而改了之後,在重開機時,系統檢查到kext被修改過,就不會載入該kext
偏偏這個又是IO相關的,進而整個系統就卡死在這個步驟走不下去了。
目前期望的作法,是關掉系統kext signing的機制,但似乎都還沒有個定案。
因為零售版的Yosemite,似乎跟之前的DP版不太一樣!?
總之就是別太衝動啊....
Chameleon SSD Optimizer災情相關(下面的討論)
http://www.macupdate.com/app/mac/43656/chameleon-ssd-optimizer
Chameleon SSD Optimizer作者在他自己的網站FAQ增加救援和回復資訊
http://i.imgur.com/KECn3wU.png ←用截圖的,方便手機查詢救援
注意裡面的<YOUR DISK>要換成自己的磁碟名稱
基本上內容應該跟下面j611062000板友分享的是一樣的。
版上 j611062000 □ [心得] Yosemite開啟trim enabler當機自救
https://www.ptt.cc/bbs/MAC/M.1412756154.A.AEC.html
(這是Beta版Yosemite)
Trim Enabler作者要大家先等等(會在此網頁更新進度)
http://www.cindori.org/status-of-trim-enabler-in-yosemite/
轉錄目前內容:
"…untested.
If you don’t feel adventurous, leave Trim disabled and
wait a couple hours. This post will be updated with more
info regarding compatibility later today."
Trim Enabler作者更新:
"Update: 3.2.6 seems to work fine for most users, but there
will be an update tomorrow to improve compatibility for those
ending up with the gray screen. I suggest you await this
update if you have not already enabled Trim, or encountered
problems trying to do so."
簡單的說,就是3.2.6應該在大部分的場合都ok (推文也已有勇者回報)
但作者建議還是等他的下一個版本,這幾天就會釋出。
--
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MAC
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