How do you increase hard drive space on an Intel hardware RAID 1 with larger disks?

I have an old RAID 1 volume from about 7 years ago. A while ago I replaced one out of two drives with a drive with 4x the size and then recently I replaced the second two out of two disks. Both of the two new disks are 4x the size of the original RAID 1 volume.

I read on SuperUser/Server Fault/Stack Exchange question that you can increase the size of the RAID 1 volume but the process is different for every make/model (difference for software/hardware and different for which specific software/hardware you have).

For Intel motherboard/hardware RAID controller and a RAID 1 volume and two new hard drives with more storage, how do you increase the size of the RAID 1 volume?

During the BIOS boot cycle you should be presented with the option to enter into the RAID settings. From there you should be able to extend the size and then grow the filesystem once it's booted back up.