Multiple devices driver support (RAID and LVM)

configname: CONFIG_MD

Linux Kernel Configuration
└─>Device Drivers
└─>Multiple devices driver support (RAID and LVM)
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Support multiple physical spindles through a single logical device.
Required for RAID and logical volume management.

selects
CONFIG_SRCU

depends
CONFIG_BLOCK