To add a second hard disk to a FreeBSD system, follow these steps:
Turn off the system and unplug it from the power outlet.
Install the second hard disk in an available drive bay or slot, following the manufacturer's instructions.
Plug the system back in and turn it on.
Determine the device name of the second hard disk. In FreeBSD, hard disks are typically identified as ada0, ada1, and so on. You can use the camcontrol command to list the available devices:
camcontrol devlist
This will list the devices that are detected by the system, including hard disks, CD-ROM drives, and other devices.
newfs command to create a file system on the second hard disk. For example:newfs /dev/ada1
This will create a file system on the second hard disk, which is identified as ada1.
mkdir /mnt/disk2
This will create a directory called disk2 in the /mnt directory, which will be used as the mount point for the second hard disk.
mount command to mount the second hard disk at the mount point that you created. For example:mount /dev/ada1 /mnt/disk2
This will mount the second hard disk at the /mnt/disk2 directory. You can then access the contents of the second hard disk by navigating to the /mnt/disk2 directory.
fstab file. The fstab file is used to automatically mount file systems when the system is booted. To add an entry for the second hard disk to the fstab file, open the file in a text editor and add a line like this:/dev/ada1 /mnt/disk2 ufs rw 0 0
This will tell the system to mount the second hard disk at the /mnt/disk2 directory when the system is booted.
It's important to note that you may need to be logged in as the root user or have superuser privileges in order to perform these tasks.