partition
also: disk partition, volume, slice
A partition is a logical division of a physical hard drive or storage device into separate sections, each functioning as an independent storage unit with its own filesystem.
A partition is created using a partition table (MBR or GPT) that divides a disk's storage space into distinct logical volumes. Each partition can be formatted with its own filesystem (ext4, NTFS, FAT32, etc.) and mounted at different points in the Linux directory tree.
For example, a 500GB drive might be divided into three partitions: a 100GB partition for the root filesystem mounted at /, a 50GB partition for /home, and a 350GB partition for data storage. This separation allows different filesystems, permissions, and growth strategies for different purposes.
Partitions are referenced in Linux as /dev/sda1, /dev/sda2, etc., where sda is the disk name and the number indicates the partition. Tools like fdisk, parted, and gparted are used to view and manage partitions on a system.