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How long should I expect it to take to do a clean install of Lion on an already-formatted disk? I'm using a mid-2010 15" MacBook Pro with an i7 and a 5,400RPM 500GB hard drive.

(I ask because I think my hard drive is in bad condition, and the installation seems like it's taking too long.)

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  • Since you install on a clean drive, is it possibly downloading the installer?
    – deceze
    Commented Jul 28, 2011 at 7:02
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    Exactly. The installer on the restore partition only contains a base system. It'll download any needed components from the 'net.
    – deceze
    Commented Jul 28, 2011 at 7:08

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About 40 minutes or so. I'm assuming a 5400RPM drive, 7200RPM or an SSD would be faster, obviously.

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Macbook Pro i7 2.66GHz - USB install (copy image to USB, not install via Snow Leopard).

1st part (downloading additional components) : ~8 minutes

2nd part (actual install) : ~18 minutes

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