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DNS ShareCenter - RAID Comparison Chart

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JavaLawyer:

RAID Level
Minimum DrivesProtection
Description
Strengths
Weaknesses
Standard



1NoneCreates a single volume for one drive or several drivesSaves on costsNo data protection like proper RAIDJBOD





1NoneAllows you to create a large virtual disk drive by concatenating two or more smaller drives togetherSaves on costsNo redundancy and limited data protectionRAID 0



2NoneData striping without redundancyHigh performanceNo data protection, one drive fails, all is lostRAID 1





2Single Drive FailureDisk mirroringHigh data protectionHigh redundancy cost because all data is duplicated, twice the storage capacity is requiredRAID 5



3Single Drive FailureBlock-level data striping with distributed parityHigh data protection, support multiple simultaneous reads and writesWrite performance is slower than RAID 0 or RAID 1RAID 5+Spare

3Single Drive FailureData striping across all drivesHigh data protection-RAID 10

41 Disk per Mirrored StripeCombination of RAID 0 (data striping) and RAID 1 (mirroring)Highest data proection, can tolerate multiple drive failuresHigh redundancy cost because all data is duplicated, twice the storage capacity is required

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