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O_DIRECT support in dd

From: Phillip Susi
Subject: O_DIRECT support in dd
Date: Thu, 17 Nov 2005 14:14:24 -0500
User-agent: Thunderbird 1.5 (Windows/20051025)

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. Did the man pages not get updated, or did this patch not make it in?

If O_DIRECT is supported, but not documented, then I wonder: 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?

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