tar, cpio, or cp?

[Alex Yukhimets <aqy6633@acf5.nyu.edu>]

Hi.

Does anyone know the best way to copy a huge directory tree (~1Gig)
to another disk (mounted at some point)? I need to preserve the
ownerships and permissions, preservation of times are optional.

I am aware of 3 ways: 
tar cpfl - dir1 | tar -C dir2 -xpf -
find dir1 -xdev -print | cpio -p -admu dir2
cp -ax dir1 dir2

Which one is considered to be safer, faster, etc?

thanks.

Alex Y.

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