Snapshot target (EXPERIMENTAL)
modulename: dm-snapshot.ko
configname: CONFIG_DM_SNAPSHOT
Linux Kernel Configuration
└─>Device Drivers
└─>Multi-device support (RAID and LVM)
└─>Snapshot target (EXPERIMENTAL)
In linux kernel since version 2.6.20 (release Date: 2007-02-04)
Allow volume managers to take writable snapshots of a device.