"Whether hardware or software, RAID is available in different schemes, or RAID levels, writes
Christine Taylor in
Enterprise Storage Forum.
"The most commonly levels are RAID 0, 1, 5, 6, and 10. RAID 0, 1, and 5 work on both HDD and SSD media...
To understand RAID levels - and RAID storage overall - it helps to know that 'always-on' is more than marketing hype for business: it's a basic expectation of customers. One of the oldest and still active technologies to achieve always-on status is RAID, or 'redundant array of independent disks.'
Developers designed RAID to improve redundancy and performance in storage systems. RAID primarily serves HDDs, though some SSDs use RAID as well, especially in hybrid arrays..."
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