Windows 磁盘分区间隙
Windows XP 磁盘碎片整理程序报告显示我的系统上许多磁盘分区的磁盘使用情况存在持续差距。 我指的不是发生的短暂的小间隙。 在下面的 D 盘中，有问题的间隙是“碎片整理”一词下方的间隙。 在下面的P盘中，间隙是“定义之前的使用”下的间隙，但更大。 C分区没有这个异常。 尺寸和放置模式并不明显。 就好像有一个区域，一个无人区，文件系统和碎片整理程序都避开它。 这些间隙在日常使用和碎片整理中仍然存在。 我不相信这是分页文件的残留物——无论如何，它应该显示为绿色。 回收站已空。
有任何想法吗？
磁盘 D（20 G）： 
磁盘 P（40 Gig）： 
Windows XP Disk Defragmenter report shows a constant gap in disk usage on a number of disk partitions on my system. I'm not referring to the little transitory gaps that occur. In disk D below, the gap in question is the one under the word "defragmentation". In disk P below, the gap is the one under "usage before def" the but a bigger one. The C partition doesn't have this anomaly. The size and placement pattern isn't obvious. It is as though there was an area, a no-man's land, that both the file system and the defragmenter avoid. These gaps survive daily use and defragmentation. I don't believe this is a residue from a paging file -- it should show up in green, anyway. Recycle bin is empty.
Any ideas?
Disk D (20 Gig):
Disk P (40 Gig):
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这可能是为 MFT 保留的空间，如果磁盘可用，该空间将仅用于文件真的很饱。 这个空的空间让它可以生长一段时间而不会破碎。
参考资料：
That is probably the space reserved for the MFT, which will only be used for files if the disk gets really full. This empty space allows it to grow for a while without getting fragmented.
References:
不知道是什么原因造成的，但是 Win XP 附带的碎片整理程序是 Diskkeeper Lite，这不是很好。 如果不是由任何原因造成的，更好的碎片整理程序可能会消除间隙。 我个人使用 O&O Defrag； 它不是免费的，但有 30 天的试用期。
No idea what's causing this, but the defragger that comes with Win XP is Diskkeeper Lite, which is not very good. A better defragger might get rid of the gap if it's not being caused by anything. I personally use O&O Defrag; it's not free, but there's a 30-day trial.
碎片整理到绝对没有间隙的程度并不一定是好事。 一些操作系统/文件系统尝试尽可能紧密地打包文件，并尽可能填充无间隙。
这样做的问题是，如果任何较早的文件被更改或附加，那么您要么留下早期间隙（这往往会出现碎片），要么强制在下一个间隙输入额外的位（再次创建碎片） 。
当您开始出现奇怪的行为时进行碎片整理（通常它会有所帮助......即使它不应该如此）； 但是您不需要每天都这样做，完全整理驱动器碎片也不是特别健康的驱动器的标志。
Defragging to the point that there are absolutely no gaps is not necessarily a good thing. Some OSs/FileSystems try to pack files in as tightly as possible and fill without gaps where possible.
The problem with this is if any of the earlier files get changed or appended to then you are either leaving an early gap (which will tend to case fragments) or forcing the extra bit to be entered at the next gap (creating a fragment again).
Defrag when you start getting weird behaviour (quite often it helps... even though it is not supposed to); however you don't need to do it every day, nor is a totally defragmented drive a sign of a particularly health drive.
就像上面的海报所说，那很可能是 MFT 的保留区。 格式化驱动器后，大约 12.5% 的分区会保留给 MFT，如果初始分配用完，该分区可以根据需要增长以容纳新记录。 请注意，如果相邻的连续可用空间不足以容纳扩展，MFT 也可能会产生碎片。
注册。 进行碎片整理，而不是定期手动进行碎片整理，省去麻烦并使用 Diskeeper。 最新版本（即 2008 Professional）是全自动的，并使用空闲资源在后台进行碎片整理。 还有一个手动/计划碎片整理模式，但我不认为有任何理由浪费我的时间； 它在我的系统上自动运行得很好。
Like the poster above said, that's most likely the reserved zone for the MFT. When the drive is formatted, about 12.5% of the partition is reserved for the MFT, and this can grow as needed to accomodate new records if the initial allocation is used up. Mind you, the MFT can also fragment if the adjacent contiguous free space is not large enough to accomodate the expansion.
Reg. defragging, instead of defragging manually regularly, save yourself the trouble and get Diskeeper. The newest version i.e 2008 Professional is fully automatic and defrags in the background using idle resources. There is also a manual/scheduled defrag mode, but I don't see any reason to waste my time; it does a fine job running on automatic on my systems.