I see that you are looking for assistance for the slow boot time when using the Intel(R) Desktop Board DQ67OW and the Intel(R) RAID Controller RS2WC040 card.
Intel(R) does not fully validate the usage of SAS controller cards on desktop motherboards. There is an option in BIOS called expansion card text that will sometimes help you with the proper recognition of the card and helps the boot to the operating system. The option will usually be found on the security or boot tab.
In regards to your second question, Linux* based operating systems are not currently supported on the Intel(R) Desktop Board DQ67OW.
Please check at the following web site the list of compatible operating systems: