Haha RAID is a way to take multiple hard drives and use them as a single drive. There are different setups with different benefits.

I’m using RAID 10, so when I put two 8TB drives into the setup, I only get 8TB of storage - the same is mirrored in each. However, when I am downloading/reading from the drives, it will pull half from one drive, and half from the other as needed, so it’s twice as fast. Then also if a hard drives ever dies on me, I’ve lost no data because it’s mirrored on both. I just take out the dead drive, put in a new one, and it’s like nothing happened.

There are other setups that go the opposite way. RAID 5 splits the difference so it’s across 3 drives and you keep 2/3rds of the data and get better read and write speeds. But you can only lose 1 drive and recovery is a little slower and kore frustrating.

Then there’s RAID 0 which just uses two drives at the same time and puts half the data on each drive. Doubles read and write speed. But it means if you lose *either* drive, you lose all the data.

UTXO is talking about using a mirrored option. You need twice the drives j write speed isn’t any better, but you get reliability & good read speeds in exchange. 

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 Wow , thank you for the comprehensive explanation, I wasn't aware that such a thing existed ! That is pretty cool. So you can speed up your read / write times and have a fail safe . Cool .