I'm running a small IT company. Specifically less than 10 persons all are developers and no system administrator. I am so to say the owner doing much of work. So now I am asking the question being a system adminstrator at this specific moment :)
Recently we bought an intel's SR1690WBR and two HDDs WD1002FBYS. I did not know what was a FAKE RAID. And it turned out the the server system we bought had one onboard (ICH10R). So I decided to buy a real hardware RAID controller. My budget is $200 and I am looking at the Adaptec 1405 http://www.adaptec.com/en-US/products/Controllers/Hardware/sas/entry/ASC-1405/.
So my question is: looking at the price of the RAID controller 1405 and at the price of the HDD doubts crept in me that installing this RAID could degrade our server's performance in some. I think so because I am not a system administrator, I just know more than basics. I understand that we will have fault tolerance with the help of RAID 1 but can I possibly loose any performance in such a configuration?