Re: O_DIRECT support in dd

[Phillip Susi]

The man pages at:

http://www.gnu.org/software/coreutils/manual/html_chapter/coreutils_11.html#SEC65

Do not document an iflag parameter.  Is this simply an error in the 
documentation?  It looks like I'm still using coreutils 5.2, so I guess 
I'll have to upgrade.  I'm wondering now why there was over a year 
between the release of 5.2.1 and 5.92, with nothing in between.

Paul Eggert wrote:
> Phillip Susi <address@hidden> writes:
>
> > I searched the archives and found a thread from over a year ago
> > talking about adding support to dd for O_DIRECT, but it is not
> > documented in the man pages.
>
> It's in coreutils 5.93 dd.  Try, e.g., "dd iflag=direct".  It's
> not documented with the phrase "O_DIRECT", though, which is possibly
> why you missed it.
>
> > does dd use aio so as to keep the IO pipelined, since a blocking
> > read/write would only be able to access one file/disk at a time?
>
> Nope.  Might be nice to add, I suppose.
>
>
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