RAID

Question	Answer
What is RAID?	Redundant Array of Independent/Inexpensive Disks
What is the difference between software and hardware RAID?	Software RAID is built into the OS and hardware RAID has a controller installed onto the MOBO for RAID
What does it mean when a device is hot swappable?	You can remove them when the system is still on without any damage occurring to the device and data is retained
What is RAID 0 (Striping)?	Stripes (splits) a file between multiple drives High performance, optimal disk space No redundancy Can cripple a network
What does redundant mean?	Multiple ways to access information if one source fails *something that has “high redundancy” means there’s many pathways
What is RAID 1 (Mirroring)?	The file is duplicated (mirrored) across multiple drives Doubles the amount of dive space High redundancy and 100% uptime
What is RAID 5 (Striping with Parity)?	The file is striped between drives One block however is a a parity block in each drive Data can then be reconstructed using the parity block Good use of disk space High redundancy with decent uptime Need at least 3 drives
What is RAID 10/ RAID 1+0 (Stripe of Mirrors)?	The files are striped across drives Then there would be a mirror of each block from each drive The mirror would also be striped Minimum of 4 drives

Resource summary

	Created by Jessica Rizo almost 4 years ago