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dd performance

To: misc_(_at_)_openbsd_(_dot_)_org
Subject: dd performance
From: chefren <chefren_(_at_)_pi_(_dot_)_net>
Date: Thu, 15 Dec 2005 16:04:48 +0100

Wiping identical 18GB SCSI disks on same Dell 1750 machine:


OpenBSD 3.8:

dd if=/dev/zero of=/dev/sd0c bs=1024k

6MB/s


Linux 2.4:

dd if=/dev/zero of=/dev/sda bs=1024k

53MB/S

Any clue about the difference? Of course I'm also interested in different ways to do this but the difference is what puzzles me.

+++chefren

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