Question
How is the storage capacity calculated for DSA E-Series E2800 12-bay (RAID 6)?
Answer
According to this E2800 DSA-N2C8XC-12AT unit, NetApp uses disks that have a net capacity of 10,691TB.
1 HDD = 10948.5 GB (NET) = 12 TB (GROSS) = 10,69 TB
12 HDDs without RAID = 128,30 TB
12 HDDs in RAID 6 = 128,30 TB - (10,69 TB x 2 HDDs)= 128,30 TB - 21,38 TB = 106.92 TB
Total capacity:
- RAID 6 contains 12 HDDs → is given by the sum of the total capacity of 10 HDDs (max. 2 broken HDDs without losing data) ex 106,92TB
- RAID 5 contains 12 HDDs → is given by the sum of the total capacity of 11 HDDs (max. 1 broken HDDs without losing data) ex 117,61TB
The VRM is using the TB value in the VRM dashboard and GB value in his logs. But all calculated with the 1TB = 1024GB
