copy full system from old disk to a new one

[Martín Marqués]

How can I pass my whole system from an old SATA disk (which is giving
me some trouble) to a new disk. I have 4 partitions, all of which I
have only passed /home using cp -.a

I'm a bit concerned about the root file system, how to change grub,
and if I'll have trouble with non-regular files from /var.

TIA!

-- 
Martín Marqués
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DBA, Programador, Administrador