Many drives come with a single partition already set up, but all storage devices are just treated as a mass of unallocated, free space when they contain no partitions. To actually set up a file system and save any files to the drive, the drive needs a partition.
The partition can contain all of the storage space on the drive or just some of it. On many storage devices, a single partition will often take up the entire drive.
Partitions are necessary because you can’t just start writing files to a blank drive. You must first create at least one container with a file system. We call this container a partition. You can have one partition that contains all the storage space on the drive or divide the space into twenty different partitions. Either way, you need at least one partition on the drive.
After creating a partition, the partition is formatted with a file system — like the NTFS file system on Windows drives, FAT32 file system for removable drives, HFS+ file system on Mac computers, or the ext4 file system on Linux. Files are then written to that file system on the partition.
A hard-drive partition is the splitting of a hard drive so that it acts as two smaller drives of smaller capacity. This is useful for installing to operating systems on a computer.
The system partition(a partition where the operating system is installed) is the active partition of the Hard Drive
system partition
System partition
Most of the time the boot partition and the system partition are the same partition on the drive C.
The area on the hard drive that contains a map to all the partition on the drive is called the partition table. That is what partition utilities edit when you add, delete, convert, or resize a partition.
extended partition
Most of the time the boot partition and the system partition are the same partition on the drive C.
By default C: is the active partition of the hard disk drive
active partition
You just partition the Hard drive not the RAM.
To remove a partition on a slave hard drive you can go into the BIOS. You should look up a guide if you plan to do this.
in Linux this is the second logical drive inthe extended partition on the primary slave hard drive