Date: Fri, 14 Jan 2005 09:13:29 -0600 From: Nathan Kinkade <nkinkade@ub.edu.bz> To: Drumslayer2 <drumslayer2@yahoo.com> Cc: freebsd-questions@freebsd.org Subject: Re: How can I speed up a dd copy? Message-ID: <20050114151329.GU3639@gentoo-npk.bmp.ub> In-Reply-To: <20050114003814.27395.qmail@web42109.mail.yahoo.com> References: <20050114003814.27395.qmail@web42109.mail.yahoo.com>
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--cwkDooxwsqZYNC1z Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Jan 13, 2005 at 04:38:14PM -0800, Drumslayer2 wrote: > =20 > Hello > When I am performing a dd between (2) 36 Gig 160 > disks (to duplicate them) it takes about 2.5 hrs. Is > there any way I can speed this up? Is there any better > way I can clone a bootable main disk? >=20 > Thanks >=20 > NH. Using dump(8) and restore(8) works well for me and it eliminates the need that the disks should be the same size. It may seem like a lot of work at first, but once you have done it a few times it can be done very fast. The benefit being that you don't waste massive amounts of time copying null blocks from disk to disk. A few months ago I wrote up a quick howto for the guys where I work. I make no guarantee that the directions are perfect for everyone, but they work fine here. It also assumes you are booting to a good installation of 5.x whose version of dump supports the dumping of "live" filesystems (I don't think the version with 4.x supported this, or at least not 4.8 - someone correct me if I'm wrong). However, you could just as easily boot to one of the FreeBSD install disks and eliminiate the need for a "live" dump in the first place. For reference, you can take a look at the short instructions I wrote up at: http://206.27.244.136:8080/ub/cloning.txt Nathan --cwkDooxwsqZYNC1z Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFB5+GYO0ZIEthSfkkRAsZSAKCt05gQ4lBObFYyMNdY6jwKc8lP2gCgj5PV 1TdhQD2NDK6vaGFi7VDHCXo= =990S -----END PGP SIGNATURE----- --cwkDooxwsqZYNC1z--
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