Re: [PATCH] 2.5.14 IDE 56

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 9 May 2002 15:58:48 +0100 (BST)

> doing the same test thru the block-layer was basically capped at around
> 135mbyte/sec. (simultaneous "dd if=/dev/sdX of=/dev/null bs=512 count=35M").

Tweak your dd to use O_DIRECT and use an O_DIRECT capable fs - that tells
you if its copy overhead or disk side stuff.
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