Windows can't support a "disk" larger than 2TB unless it is GPT.
Windows can't boot a GPT "disk" unless it is installed in UEFI mode.
Each RAID array is presented to Windows as a separate "disk".

You need to do one of three things:

1. Change boot mode from BIOS to UEFI, then reinstall Windows.

2. Keep BIOS setting and configure two 1TB RAID 1 arrays.

3. Add additional disks small enough to install the OS, then convert your 4-disk 3TB RAID 5 to GPT to use the entire capacity for data.

I would recommend you configure a RAID 6 instead of RAID 5.

Thanks Dear, Problem solved by converting disk to GPT and by changing boot mode from BIOS to UEFI.