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Disconnecting the optical drive is only a matter of pulling out the SATA cable.
With one of iFixit's optical bay hard drive enclosures, it might be possible to put yet another hard drive inside the Z1.
This, of course, would mean a loss of Blu-ray capabilities, but with one of iFixit's hard drives installed, you can fit up to 50 HD movies inside the computer!
Green means go as the optical drive bracket speeds out of the Z1.
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