It turns out that Dell PowerEdge servers (like the T310) with PERC S100 do not support RAID on Ubuntu. Bummer. But here is how I got Ubunutu software RAID 1 to work with my Dell PowerEdge T310, PERC S100 and Ubuntu 10.04 LTS…

The main trick was to turn re-initialize the PERC Controller to use non-raid:

  • As the Dell T310 boots, you will see a brief prompt from the Perc Controller telling you to press CTRL-R to configure it. Press CTRL-R.
  • Choose “Initialize Physical Disks”
  • Choose “Initialize to non-raid”
  • Select both disks and continue
  • NOTE: I went through this twice, and I found that before I could complete the steps above, I had to first choose “Delete Virtual Disks.” Again, I chose both disks and continued, and then I was able to complete the steps above.

Now you should be all set to set up the Ubuntu built-in software RAID 1. Here is a good guide to walk you through that:

https://help.ubuntu.com/10.04/serverguide/C/advanced-installation.html

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