Morning,
Mac Pro has 4 internal drives, OS X Boot disk irrelevant as too where 
installation is placed in this collection.
Windows drive or partition has to be Drive Bay 1?

My Regime for Mac Pro is:
Drive 1 OS X and relevant Software, Users etc, This Drive is Cloned once 
installation complete with Cloned drive removed to safe place. (Archived 
Monthly)
Drive 2 working Libraries, Imagery , Audio, regularly used stuff I require to 
complete projects (cloned, archived weekly).
Drive 3 being project I am working on as is Drive 4 normally being a mirrored 
RAID of Drive 3.
All Drives single partitions.

Once project complete I archive on and offsite or give client one of the 
mirrors.

I have other drives with Window installations and Linux installations I drop in 
and out accordingly using option key to select at boot, as I  Firmware Protect 
machines.

Personally I removed my SL installed drive replacing with brand new one 
installed Lion then required software.
So if something does need SL I just drop in and away I go, as if machine never 
touched.

Must mention I use OS X server for intranet email (imap), VPN, and file 
servers, backup devices. Company eMail is externally controlled by Web Host via 
IMAP.

Remember that Lion is a "Major Upgrade," as it removes all possibilities of 
running Software that has not been converted to 64bit and Lionised. 

Hope helps?

Cheers
`RobD...

On 22Jan2012, at 11:06 am, Pat wrote:

> I am cautiously dipping my toe into the Lion pond.  I installed Lion on the 
> MacMini that minds the EyeTV.  Now I am thinking I would like to install it 
> on the Mac Pro, but I want to keep the functioning Snow Leopard.
> 
> I have kept all WAMUG letters about installing Lion.  Most of them speak of 
> installing it on an external disk.  The Mac Pro has 3 internal hard disks, 
> the 2 secondary disks are partitioned for various purposes.  There is one 
> totally empty 700 GB partition available.  My question is, is it safe (and 
> possible) to install Lion there?  I have encountered other software that 
> insisted it had to be installed on the primary disk, where SL currently 
> resides.
> 
> Or would it be better to SuperDuper the SL into the empty partition and put 
> Lion on Disk 1?
> 
> Another question:  I know that the same copy of Lion can be installed on more 
> than one computer.  Is this the case now for other Apple software bought 
> through the App Store?
> 
> Thanks,
> Pat
> -- The WA Macintosh User Group Mailing List --
> Archives - <http://www.wamug.org.au/mailinglist/archives.shtml>
> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml>
> Settings & Unsubscribe - 
> <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>

-- The WA Macintosh User Group Mailing List --
Archives - <http://www.wamug.org.au/mailinglist/archives.shtml>
Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml>
Settings & Unsubscribe - <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>