Your customer has just purchased ten 1TB NL-SAS drives for their VNX array. This additional capacity will be used to archive their large image repository.
Which configuration will provide the most efficient use of capacity while still following best practices?
A.
Two RAID Groups with five drives each in a RAID 5 configuration
B.
One RAID Group with ten drives in a RAID 1/0 configuration
C.
One RAID Group with ten drives in a RAID 6 configuration
D.
Two RAID Groups with five drives each in a RAID 6 configuration
Ten drives in RAID 6 is not best practice. Multiples of 8 drives is BP for R6, 5 drives for R5 and 5 drives for R1/0, so the answer must be A.
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You ‘can’ do 8+2 RAID 6 groups on a VNX, but it isn’t best practice. Also, while you can do RAID 5 for 1TB drives, it is not best practice for NL-SAS. I would say from the options the best for best practice would be RAID 1/0, however that doesn’t give you the most efficient use of capacity. With that said, all of the answers are bullsh*t. Has anyone taken the test that can verify this question with these specific answers are given?
See the site below for the RAID 6 8+1.
http://www.penguinpunk.net/blog/emc-sometimes-raid-6-can-be-a-pita/
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