raid for comptia
Here are the RAID types in CompTIA
RAID 0 is writing data to two drives at once. Very fast half data on one drive half on the other. no fault tolerance cause one drive down and lose half of the data. 0 for no fault tolerance
RAID 1 is first level of fault tolerance. You literally copy the same data to both drives. If one dive goes down, no problem the other is a duplicate
RAID 10 means you put half on one drive and half on the other and make a copy of each half. Now you have speed plus a duplicate if one drive crashes.
Hands-on inspiration
https://www.tecmint.com/understanding-raid-setup-in-linux/
Part 1 Introduction of a 9 part series to use RAID in Linux.