Date: Wed, 19 Oct 2005 10:22:00 +0530 From: Ramakrishna Nalla <nallark@gmail.com> To: Bob Ababurko <ababurko@adelphia.net> Cc: freebsd-questions@freebsd.org, Craig Deal <craig@advantagecomputer.biz> Subject: Re: Replacing a failing HD Message-ID: <14f2d8380510182152j29088e0ake14df20f61154fff@mail.gmail.com> In-Reply-To: <435576A8.7070203@adelphia.net> References: <200510181619968.SM01300@craiglaptop> <435576A8.7070203@adelphia.net>
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But, won't doing a dd between two disks with incompatible sizes create a ba= d partition table on the destination drive? TIA, Rama On 10/19/05, Bob Ababurko <ababurko@adelphia.net> wrote: > > Craig Deal wrote: > > > > > >>>Hope it's ok to continue this thread, but can you explain in more > >>>detail how to use dd to copy a HD. I read "man dd" and was > >> > >>unable to > >> > >>>figure out how this is done. > >>> > >>>Thanks, > >>>Craig > >>> > >>>_______________________________________________ > >>>freebsd-questions@freebsd.org mailing list > >>>http://lists.freebsd.org/mailman/listinfo/freebsd-questions > >>>To unsubscribe, send any mail to > >> > >>"freebsd-questions-unsubscribe@freebsd.org" > >> > >>This is what I have done in the past. > >> > >>dd if=3D/dev/da0 of=3D/dev/da1 bs=3D8192b > >> > >>where da0 is the disk you want to copy and da1 is the new, > >>blank disk. > >>I should also mention that it is wise to do this in single > >>user mode. I actually have read this somewhere and > >>understand the point of it, but I must also say that I have > >>done it both ways and they have both worked. > >>YMMV I would have to say it is all dependant and what you > >>have running. > >> > >>I have done this too many times to count and it is very easy. > >> > >>peace, > >>Bob > >>_______________________________________________ > >>freebsd-questions@freebsd.org mailing list > >>http://lists.freebsd.org/mailman/listinfo/freebsd-questions > >>To unsubscribe, send any mail to > >>"freebsd-questions-unsubscribe@freebsd.org" > >> > > > > > > I tried this and got the following error: > > > > ad0: FAILURE - READ_DMA status=3D51<READY,DSC,ERROR> > error=3D40<UNCORRECTABLE> > > LBA=3D8387712 > > > > Any ideas what the problem might be? Do the hard drives have to be > > identical? One is a 30Gb and the other is a 60GB. > > > > Thanks, > > Craig > > > > _______________________________________________ > > freebsd-questions@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" > > > > I would think that you can dd from a small drive to a large drive, but > if the is possible _definitely_ not the other way around. Which size > are source and dest. drive? > > -Bob > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" >
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