Description

This driver lets you combine several hard disk partitions into one logical block device. This can be used to simply append one partition to another one or to combine several redundant hard disks into a RAID 1, RAID 4, or RAID 5 device to provide protection against hard disk failures. This is called software RAID because the combining of the partitions is done by the kernel. Hardware RAID means that the combining is done by a dedicated controller; if you have such a controller, you do not need to say yes here.

More information about software RAID on Linux is n the Software RAID mini-HOWTO, available from https://www.tldp.org/docs.html#howto. There you will also learn where to get the supporting userspace raidtools utilities.