One of the drives failed on my RAID 1 setup, so I bought a non-certified dell drive, Seagate Barracuda 500gb (the other drives were 250gb).

I powered off the machine and swapped the failed drive with the new one (cable connections)

When I boot into Sas controller (SAS 6 ir) it shows that the drive is missing.

I turned off the server and switched the cables from the primary to the new drive, to see if it would make a difference. None. Still shows "drive status: missing"

Do I have to buy dell certified drives? Am I doing something wrong? Or is the RAID controller out of date?

Any help would be appreciated! My primary hardrive is showing signs of failure. I have an image of it, but I would like to get it mirrored on my new drive ASAP.

Thanks,