Snow Leopard RAID 0 in Lion?

Hi, I know Lion isn't out yet, but does anyone already know if a software RAID 0 (2x1TB) created using Disk Utility in Snow Leopard will be recognized by a clean install of Lion? (Let's assume you can do a clean install of Lion)

If not, will a software RAID 0 created in Lion be recognized if I boot Snow Leopard from a second drive?

The reason I ask, is that this RAID 0 has files on it that I'd like to be able use in both operating systems.

Mac Pro, Mac OS X (10.6.8)

Posted on Jun 29, 2011 7:33 AM

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19 replies

Jul 22, 2011 7:11 PM in response to anguz

anguz, thank you for your post. I'm using SoftRaid to run a striped array. So far Lion install has failed with both SoftRaid and the AppleRaid driver. Your backup advice is well taken. I've got a Drobo on my Mac Pro which I plan to share with my small home network. It's a tortoise but it always gets to the finish line. So far at least.

Jul 22, 2011 8:25 PM in response to Taunger

Yep - unfortunately if you have a stripe you are out of luck - unless you create a single Apple disk/volume to install onto and I suppose try to copy the result of the install back onto the stripe. Lion will not install on _any_ RAID array directly. My posts are only relevant if you are using RAID 1 (mirroring) and you can afford to break the mirror which belies the subject of the topic I guess.

Aug 29, 2011 2:31 AM in response to Taunger

http://elaura.tumblr.com/post/8689849492/installing-lion-on-a-raid-volume

http://reviews.cnet.com/8301-13727_7-20084953-263/raid-and-lions-filevault-disk- encryption-do-not-mix/


I finally did it, I now have Lion installed on my RAID 0 (two 500GB seagate SSD/HD hybrid drives).


What I did was sort of a combination of the two links I posted.


I Used a Lion recovery disk (USB drive), choose Disk Utilty first to create a fresh new RAID 0 set.

Choose "install Lion" on to the Raid 0 partition, then wait till it download from apple.

After it finished downloading stuff, It restarted and showing installing screen, wait about 33 minutes.

I ran into trouble the first time after about 10 minutes, it just restarted itself and stuck on that installing screen.

But this time I guess the version it download directly from apple is a different build, after it finished installing, it sucessfully install a fresh copy of Lion on my Raid 0.

I did a transfer from my time machine backup (Snow Leopard 10.6.8) and it's perfectly working now.

Only one thing I found strange is that when I open disk utilty now in LION, it won't let me do any permission repair/verify on the RAID 0 (which is the startup drive).

Another thing I found interesting is apparently when you do a internet recovery (install freshly direct download from apple using the recovery disk), it's not 10.7, it's the latest version which is 10.7.1


Hope this help

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Snow Leopard RAID 0 in Lion?

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