I have a dell poweredge 2900 with 2 hot swap hard drives raid 1 for my c drive and 3 raid 5 drives for my d drive. I am running SBS2008 and SQL server 2008 with most of my data on my d drive. I am running out of space on my c drive and was wondering if I removed both my c drives and installed larger drives and reinstalled the operating system: If I didn't have enough time to finish the new drives could I reinsert the original drives and would the computer recognize them with no change? If so I could later continue my new setup and would the new c drives recognize the d drives? Also, I have perc6i, SAS RAID controller
I tried this once and had no issues. Was in a similar situation as you. Needed to upgrade the root. But since I have issues with the installation, I just popped in the old HDD in THE SAME ORDER and it worked fine.
The only difference was I had Raid 5 (3 HDD's) for the root as well.
Hope this helps.