Date: Sun, 30 Sep 2001 15:59:36 -0500 From: Mike Meyer <mwm@mired.org> To: "Mario Doria" <madd@tecdigital.net> Cc: questions@freebsd.org Subject: Re: Copy a disk using dd Message-ID: <15287.34744.739567.546962@guru.mired.org> In-Reply-To: <113500895@toto.iv>
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Mario Doria <madd@tecdigital.net> types: > Hi, > > On some machine with 2 identical disks, I want to copy everything on the > first drive to the second drive (mirror copy). The disks are da0 and da1. > I'm thinking of using: > > dd if=/dev/da0 of=/dev/da1 bs=8192 > > Is this OK? Yes, provided that none of the file systems on da0 are active, and none of the ones on da1 are mounted. Doing it single user without mounting anything or enabling swap is recommended. I would recommend a *much* larger block size, though. At least a half-cylinder, though if you can fit multiple cylinders memory without swap, as many as you can fit is fine. <mike -- Mike Meyer <mwm@mired.org> http://www.mired.org/home/mwm/ Q: How do you make the gods laugh? A: Tell them your plans. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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