Block storage, as used herein, may refer to a data storage scheme or model in which data is saved to storage media in fixed-sized raw data chunks (referred to as “blocks”). The raw data blocks may contain no metadata. Each block may be associated with a unique address as metadata assigned to the block. Storage blocks may be controlled by an operating system (OS) and may be accessed by a protocol (e.g., iSCSI, Fibre Channel, or Fibre Channel over Ethernet).
A storage volume, as used herein, may refer to an identifiable unit (e.g., a physical unit or a logical, virtual unit) of data storage. The storage volume may be mounted to a device via an operation system and be configured with a specific file system (e.g., New Technology File System) assigned a system-unique name or number that identifies the storage volume. The storage volume may represent a named, logical area of storage that enables users and applications to access data on the underlying device. By way of example, a storage volume may be a logical disk that represents a named, logical area of a physical storage device (e.g., a hard disk drive, solid-state drive, compact disc read-only memory, digital video disk, floppy disk, or any other type of storage device). In some embodiments, a logical storage volume may span multiple physical storage devices (e.g., hard disks) and appear as a single, contiguous storage area that works like a physical volume. Storage volumes may be flexibly configured, such as being expanded, contracted, mirrored, stripped, or adapted to support multiple disks (e.g., redundant array of independent disks).