Well supported Hardware Raid Controller

I am currently planning to buy a hardware-raid controller. This became necessary since I am running Linux and Windows in parallel and now need the redundancy for both OS (Im am going to use RAID1 / Mirroring).

Therefore I am searching for a hardware raid controller which is well supported by linux / ubuntu (reporting smart values, stats for the harddrives, etc...). This controller should have four sata ports and if possible it should fit in a PCIE-1x Slot.

I would greatly appreciate, if you could suggest some devices.

Thanks in advance

I suggest that you take a look at following:

http://www.ubuntu.com/certification/catalog

Edit:

Following raid cards are certified:

http://www.ubuntu.com/certification/catalog/category/RAID

Get a good LSI controller and move on. Great SATA and SAS support so now you have an upgrade path when you need it.