Device Mapper Concepts

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Overview

Device Mapper is a kernel-based framework for volume management. It maps physical block devices onto higher level virtual block devices. Device mapper also offers file system snapshots and thin provisioning. The device mapper framework is the foundation of logical volume manager (LVM), software RAIDs, dm-crypt disk encryption and Docker device-mapper storage backend

Encryption

dm-crypt

Logical Volume Management

Logical Volume Management Concepts

/dev/mapper

The entries in /dev/mapper can be LVM logical volumes, dm-crypt encrypted volumes, etc.

RAID

RAID Concepts

Device Mapper Operations

Device Mapper Operations