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D-Link FAQ => ShareCenter FAQ => Topic started by: JavaLawyer on October 25, 2011, 02:18:03 PM

Title: DNS ShareCenter - RAID Comparison Chart
Post by: JavaLawyer on October 25, 2011, 02:18:03 PM

RAID Level


Minimum Drives

Protection


Description


Strengths


Weaknesses


Standard




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






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




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






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




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


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


4
1 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