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Clon disks with dd command

Hi all, I have a Debian Etch machine with a SCSI HD as a master disk. I
want to make a clon to another similar SCSI HD (same model and size), in
order to use it if the production disk fails.

People talk about "dd" command, telling it's possible to get a exact
mirror from one disk to another just running this:

dd if=/dev/sda of=/dev/sdb

Is this just the solution ??? No matter with the MBR or something else ???

Really thanks,


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