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RAID 01

Requiring at least 4 drives, RAID 0+1 is a combination of, firstly, stripe (RAID 0) and then mirroring (RAID 1). Hence the term “RAID 01“.

raid01
1) The data is sent from server to RAID controller
2) RAID controller will then stripe the data
3) Then data set ABCD will be sent to array 1, and mirrored to array 2. Data set EFGH will be sent to array 3, and mirrored to array 4 and so on.

What happens during drive failure is that if a drive in “array 1” fails, that whole array is lost, due to the nature of RAID 0. However, “array 2” will still function as normal.

However, “array 2” will then function solely as a RAID 0. If any of the drives in “array 2b” fails, the system will go down and you will lose the entire array.

Another disadvantage here is storage capacity is halved, due to mirroring.

Data recovery Salon welcomes your comments and share with us your ideas, suggestions and experience. Data recovery salon is dedicated in sharing the most useful data recovery information with our users and only if you are good at data recovery or related knowledge, please kindly drop us an email and we will publish your article here. We need to make data recovery Salon to be the most professional and free data recovery E-book online.

 
 

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