由于固态硬盘(SSD)的写入数据模式,是先抹除旧数据后再写入新资料,不像传统式磁盘可以直接进行数据的覆写,这种特性导致SSD会有越用效能越慢的状况。为了解决这个问题,微软在Windows 7的操作系统中内建了一套专为SSD开发的TRIM指令,使SSD在删除档案时,只是先将其区块位置标记为删除,等到系统闲置时再完成实际清理空间的工作,以避免产生掉速的情形。
除此之外,如果您的系统碟是SSD,TRIM指令还会自动禁用碎片整理、ReadyBoost等功能;因为这些原本是为传统硬盘所设计的,但对SSD来说反而会增加不必要的写入动作而影响寿命。此外,要启用TRIM指令,必须操作系统与SSD主控芯片两方都同时支持, TRIM指令才能正确运作;而威刚的SSD产品皆支持TRIM指令。
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