Just got my "new" 2009 and was surprised that although it started up and seemed to run fine (passed all tests in TTPro suite with not so much as a bad sector) , the startup drive did not appear on the desktop. At first I thought it might be suspended in space off screen somewhere but that was not the case. Perplexed, I undertook my first cursory exploration of a Mac Pro and after poking around the OS a bit I discovered that the 500GB disk the unit sold with was attached to an Apple RAID card that the seller had graciously gifted me with. The "Untitled" disk apparently had been part of a RAID, its soulmate/s sadly wrenched from it and dispersed to unknown regions of digital Hades. Oh, the horrors of being a digital appliance! As a sensitive person myself I'm worried that "Untitled" might be a bit unstable and possibly hurting, so I'm deferring any further operations like upgrading OS and cloning until certain no permanent damage will be precipitated. I'm assuming this disk's identity has been compromised and that's why it's reluctant to show itself. Can I simply disconnect it from the controller and attach it like a normal drive? Regarding the Apple RAID card itself, is there any reason not to keep it and perhaps even purchase a new companion for "Untitled"? The RAID utility indicates that the battery is being conditioned but as this is going nowhere the battery must be dead. Can I install a new battery? Thanks for any insights.