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How to Recover Failed RAID 0+1 and RAID 1+0?
- by Fun Anku
RAID 0+1 and RAID 1+0 are two different nested forms of RAID levels and hence should not be confused with each other. When it comes to performance and reliability RAID 1+0 proves better than RAID 0+1. Observations reveal that while disk failure, RAID 1+0 continues to give good performance as rest other disks continue to function. However, if complete system fails due to multiple hard drives failure nothing works but RAID Data Recovery service.
RAID 0+1 is configured as striped sets in a mirrored set i.e. in this configuration, first various disks are striped into sets and then mirrored together. On contrary, RAID 1+0 is mirrored sets in a striped set i.e. first some drives are mirrored together and these mirrors are striped with each other. In RAID failure context, you need not to worry if a single hard drive fails in any of these two configurations. The situations of complete system failure are described as follows:
1.RAID 0+1: RAID 0+1 system cannot fail until the failed drives are from the same mirror set. The complete system failure will only result if you one drive from all disk sets. When calculated mathematically, if n refers the total number of RAID 0+1 system drives and there are two set of drives in the system, the odds of complete system failure due to failure of two drives is (n/2)/(n - 1)
2.RAID 1+0: As compared to RAID 0+1, the RAID 1+0 behaves much reliable due to the reason that it creates striped set from mirrored drives. The array can continue to operate while multiple hard drive failure till you lose all the drives in a mirror. Using the same assumptions as we took above, the chances that the complete RAID 1+0 failure that has two drives in a mirror is 1/(n - 1).
RAID Recovery techniques followed by recovery experts are unique, complicated and advanced. So, if a RAID 0+1 or RAID 1+0 system fails, it is advised not to be RAID recovery expert by your own. To prevent further damage and to successfully recover the data, you should better consult a reputed company that provides professional RAID Data Recovery service.
About the Author
Fun Anku has 6 Years of Experience in the Software Technology field working as a freelancer with Stellar which offers RAID Data Recovery, Data Recovery, Server Recovery for more than 10 years.
