Hi there sajib_prince,
Do you mean port instead of RAID by any chance? Do you have two drives, attached to SATA port 0 and SATA port 1? Where is your OS located?
If this is the case, then yes, you can add the SSHD into your system. Do you want this to be your main drive?(OS one) You can attach the SSHD to SATA port 0 and one of your HDDs to SATA port 2. Yet, you need to go to BIOS and adjust the boot order, so your system can boot from your OS HDD. (SATA port 1 or 2)
Did I get all of this right?
Let me know in case you have some more questions,
D_Know_WD