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Re: O_DIRECT support in dd

From: Paul Eggert
Subject: Re: O_DIRECT support in dd
Date: Thu, 17 Nov 2005 22:42:16 -0800
User-agent: Gnus/5.1007 (Gnus v5.10.7) Emacs/21.4 (gnu/linux)

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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