Here's why this could happen: the metadata update would erase any reference to the original data block(s), but would point to data block(s) on disk that were never filled with data.

出现这种情况的原因如下：元数据更新删除了对原先数据块的任何引用，却指向磁盘上没有填充过数据的数据块。

youdao

I will use the letters as reference for the different sorts of challenges, but first we need to understand Point s.

我用字母来代表不同类型的挑战但是我们首先应该明白S点。

youdao

This article lays its key point in analyzing the advantage and defect of blog, providing some reference for education blog s application to teaching.

本文的重点在于分析了教育博客的优势与缺陷，为教育博客应用于教学提供了参考。

youdao

So this unique temperature and unique pressure defines a triple point everywhere, and that's a great reference point.

这样，无论在何处,三相点都具有相同的温度和压强,十分适合来作参考点。

麻省理工公开课 - 热力学与动力学课程节选

But, you know, his experiment wasn't so great, and, you know, maybe had a fever when he did the reference point with 96, whatever. It turns out that it's not 96 to 9 be in good health, it's 98.6 -- whatever.

但是他的实验做得并不特别好，也许他测定96度的参考点时,发了烧还是怎么，总之健康人的体温,不是96度，而是。

麻省理工公开课 - 热力学与动力学课程节选

Before the advent of the euro, Germany's mark was Switzerland's main point of reference including a period in the 1970s when the Swiss National Bank pegged the franc against the mark to rein in a surge in the Swiss currency.

WSJ: Banks Prep for Life After Euro

For the last 52 years, the equipment from Joe Kittinger's mission had been the reference point.

ENGADGET: Art Thompson, Red Bull Stratos' technical project director, talks circuit breakers, wind shear and biomedical data

As a reference point, the U.S. might use the standard of the British, who now seem chipper enough about troubled southern Iraq to begin drawing down their forces there.

NPR: U.S. Troops Surge Toward an Exit in Iraq