✌️RAID

RAID Definition

A Redundant Array of Independent Disks (RAID) is a method of configuring member drives to create high availability and high performance systems. The RAID level provides different degrees of redundancy and performance; it also determines the number of members in the array

RAID level

The RAID level is what determines the relationship of the disks.

RAID 0	RAID 0 combines two or more disks by stripping data across them. That chunks of data are written to each disk in the array alternately.	1 - 8	Drive count * Drive size	None
RAID 1	RAID 1 is a configuration that mirrors data between two or more disks. Everything written to the array is placed on each of the devices in the group, so each disk has a complete set of the available data.	2	Drive size	1

*Redundancy means how many drive failures the array can tolerate. In some circumstances, an array can tolerate more than 1 drive failure.