I can reproduce these findings:

c:\test>dir fred
15/09/2011  16:09                 6 fred

c:\test>dir /T:C fred
15/09/2011  16:09                 6 fred

c:\test>dir /T:A fred
15/09/2011  16:09                 6 fred

c:\test>del fred

c:\test>echo . > fred

c:\test>dir fred
20/09/2011  14:41                 4 fred

c:\test>dir /T:C fred
15/09/2011  16:09                 4 fred

[download]

It seems to be explained by file system caching. This snippet from MS:

Timestamps are updated at various times and for various reasons. The only guarantee about a file timestamp is that the file time is correctly reflected when the handle that makes the change is closed. .... The NTFS file system delays updates to the last access time for a file by up to 1 hour after the last access.
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^3: Re-Creating a file does not change inode modification time (Windows) by BrowserUk
in thread Re-Creating a file does not change inode modification time (Windows) by rovf

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.