Date: Tue, 28 Mar 2006 21:04:12 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: eksffa@freebsdbrasil.com.br Cc: freebsd-hackers@freebsd.org Subject: Re: cloning a FreeBSD HDD Message-ID: <20060328.210412.18287651.imp@bsdimp.com> In-Reply-To: <4429972C.5030806@freebsdbrasil.com.br> References: <44296F41.1050209@osoft.us> <4429959B.4070209@elischer.org> <4429972C.5030806@freebsdbrasil.com.br>
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In message: <4429972C.5030806@freebsdbrasil.com.br>
Patrick Tracanelli <eksffa@freebsdbrasil.com.br> writes:
:
: >> I heard its faster if you use two dd's; i.e:
: >>
: >> # dd if=/dev/ad0 bs=64k | dd of=/dev/ad1 bs=64k
: >>
: >> allowing read and write to proceed in parallel.
: >
: >
: > that's what ddd and 'team' are for.
: > I don't know if ddd is in the ports as it may clash inname with teh
: > debugger ddd
: > They internally fork and use several processes synchronised in some manner.
:
: Isn't dump+restore and a couple of fdisk+bsdlabel trick to copy the
: source partitioning a better choice to "clone" this HDD?
Yes. That's what I *ALWAYS* do, because hard drives are never the
exact same size.
fdisk -I makes the fdisk part easy. bsdlabel -R makes the disklabel
cloning relatively painless.
dump + restore is slow but reliabe.
Warner
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