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View Full Version : OK to Install Lion on external hard drive?




ohla313
Jul 29, 2011, 02:12 PM
I have a brand new drive in an enclosure that I want to install Lion to. I made a boot disc and USB drive to do this. My plan is to install Lion onto the external drive while keeping my original hard drive in my MBP with SL.

My main question is: Would it be ok to install Lion to a USB external drive?

Later when Lion gets all compatibility issues settled, I plan to switch the drives. Would this be done with no complication?

Also should I install via USB or DVD?



Jerome Morrow
Jul 29, 2011, 02:22 PM
To USB external drive is fine, but it will be slower (you already know that). There are quite few problems with firewire, so you should avoid that for now.

Madd the Sane
Jul 29, 2011, 02:29 PM
Wirelessly posted (Mozilla/5.0 (iPod; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

I had Snow Leopard booted off of an External HD until the HD died. It should be possible to do the same with Lion.

gentlefury
Jul 29, 2011, 02:30 PM
It can be done, but its really not recommended...it will be very slow and most likely very unstable. Best method would be eSata if you have a card for it. Thunderbolt could handle it too....but the only MBP with thunderbolt already has Lion on it.

iLog.Genius
Jul 29, 2011, 02:36 PM
It can be done. I've been using Lion on an external HDD to play around with it. It is slower (depending on which application you're running or want to run) but it isn't terribly slow, in some won't even notice a big difference.

sunnyj
Jul 29, 2011, 03:03 PM
i would carbon copy your current harddrive to the external, format your internal drive with 2 partitions, in one partition install SL and the other partition install Lion.

gentlefury
Jul 29, 2011, 03:13 PM
i would carbon copy your current harddrive to the external, format your internal drive with 2 partitions, in one partition install SL and the other partition install Lion.

This is a much better solution.

ohla313
Jul 29, 2011, 03:37 PM
Well I have two hard drives so I rather keep them separate. I installed Lion on the new drive without a hitch. Waiting for spotlight to finish indexing. My install took 14gb of my drive when I checked it's info after I first logged in. Is this normal?

sunnyj
Jul 29, 2011, 03:56 PM
why do you want to keep them seperate?

ohla313
Jul 29, 2011, 04:04 PM
Because I eventually will use lion as my primary machine and don't want to clutter that drive.