你能透過減少硬碟的總容量來提高硬碟的可靠性嗎？

你的電腦有一個巨大的硬碟驅動器，你顯著使用不足。減小主分割槽的大小實際上會增加驅動器的壽命嗎？...

你的電腦有一個巨大的硬碟驅動器，你顯著使用不足。減小主分割槽的大小實際上會增加驅動器的壽命嗎？

今天的問答環節是由SuperUser提供的，SuperUser是Stack Exchange的一個分支，是一個由社群驅動的問答網站分組。

問題

超級使用者讀者Chazjn很好奇，如果不充分利用他的磁碟空間，是否真的會延長驅動器的壽命：

I have a used 3TB SATA hard drive kicking around that I am planning to use as a replacement in a Win 7 box.

I don’t need all this capacity so was I thinking if I format it to 1TB I would increase the reliability. My thinking behind this is based on the following thoughts:

There would be more physical ‘breathing space’ between each sector/track.
When bad sectors are found, there be a larger pool of unallocated sectors to bring into use.

Are my assumpti*** true?

If my assumpti*** are not true then what happens to all the unused space? Does the hard drive still format to the same physical dimensi***; thus would my 1TB drive still be squeezing sectors onto the platter as if it were formatted to 3TB.

Many thanks!

那是怎麼回事？他關於少用磁碟的理論成立嗎？

答案

超級使用者貢獻者Mokubai介入並推翻了這一理論：

Your assumpti*** are wrong.

The drive has a fixed physical format that is made up of physical sectors, in your case totalling 3TB. By formatting the drive you are effectively clearing the data in those sectors but you are not rearranging them or changing their physical size or layout in any way whatsoever. By formatting at a lower capacity you would simply be wasting the extra space, it would exist but would simply not be being used foranything at all.

Formatting does not change the physical sector size nor space between tracks.

As to unallocated sectors, I believe that drives have a preset number of reserved sectors for reallocation and the drive has no way of telling whether sectors are used by the operating system. SSDs do have a feature called “trim” that can tell the drive the sectors are clear to be wiped but this is something slightly different, spinning platters lack any kind of similar feature. Un-formatted sectors would not be used for bad sector reallocation.

By formatting a 3TB drive as 1TB you are simply preventing yourself from using 2TB of space and thus wasting 2/3rds of what you spent on the drive. Your 1TB partition would be sitting in front of 2TB of empty space.

雖然格式化/分割槽不會延長驅動器的使用壽命，但您仍然可以透過為作業系統/應用程式建立一個分割槽和為資料建立另一個分割槽來充分利用分割槽。如果作業系統出現問題或完全重新安裝作業系統，您的資料將安全地儲存在驅動器的單獨區域中。

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