Grub2: How to clone a bootable disk?

To: "debian-user@lists.debian.org" <debian-user@lists.debian.org>
Subject: Grub2: How to clone a bootable disk?
From: T Elcor <telcor@yahoo.com>
Date: Fri, 24 Aug 2012 10:34:54 -0700 (PDT)
Message-id: <[🔎] 1345829694.47950.YahooMailNeo@web121906.mail.ne1.yahoo.com>
Reply-to: T Elcor <telcor@yahoo.com>

Hi,

I have two identical hard drives, one HD contains a bootable wheezy installation and I'd like to clone it to the other HD. My first idea was to use "dd" but since grub2 uses disk IDs in /boot/grub/devices.map and /etc/fstab then once the disk is cloned it probably will not boot, unless I fix the entries in the above files. To fix the files I need to know disk IDs and partition UUIDs... not sure how to get them. Is there an easier way to clone a bootable disk without editing grub2 and fstab files?

Thanks

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