Marketing vs. Actual Usable per drive numbers likely... A 1.92 TB drive nets you 1788.14 GB of usable space per drive. That will likely adjust your numbers down close to what you were provided.
Hi there guys, I had a sales guy tell me: Capacities based on 30% R10 / 80% R5-9. obviously you cant have 30/80 so I am assuming him meant 30/70 which seems to the the average I am having trouble understanding how the usable figure below came about? 1.9TB MRI SSD 24 Disk (23 usable) 93,794 IOPs 32,038GB Usable   My calculations which I assume are incorrect: 23 usable drives would give 43.7TB RAW [NAME]/70 write/read   30/70 RAID 10 and RAID 5-9 43.7 x0.3 = 13.11 TB RAW would be used for writes 13.11/2 = 6.55TB usable RAID 10 43.7-13.11=30.59TB left RAW 30.59x0.89=27.2251 usable at RAID 5-9 6.55+27.2251=33.784TB usable  30/70 RAID 10 and RAID 5-5 43.7 x0.3 = 13.11 TB RAW would be used for writes 13.11/2 = 6.55TB usable RAID 10 43.7-13.11=30.59TB left RAW 30.59x0.8=24.472TB usable RAID 5-5 6.55+24.472=31.022TB usable What am I missing? Cheers
Usable disk sizing question Compellent