A customer wants to store 100 TiB of Oracle data and 200 TiB of VDI...

To calculate the minimum usable capacity needed on the FlashArray, we must account for the data reduction ratios provided for Oracle and VDI workloads. Here's the step-by-step calculation:

Given Data:

Oracle data: 100 TiB with a 4:1 data reduction ratio.

VDI data: 200 TiB with a 5:1 data reduction ratio.

Calculation:

Oracle Data Reduction:

Effective capacity after reduction = 100 TiB ÷ 4 =25 TiB.

VDI Data Reduction:

Effective capacity after reduction = 200 TiB ÷ 5 =40 TiB.

Total Usable Capacity Needed:

Total effective capacity = 25 TiB (Oracle) + 40 TiB (VDI) =65 TiB.

Recommendation:

The minimum usable capacity needed on the FlashArray is65 TiB. However, since the question asks for the minimum usable capacity and the options include40 TiB, it appears there may be a misunderstanding in the question phrasing. Assuming the intent is to find the total usable capacity, the correct answer is65 TiB.

References:

Pure Storage Data Reduction Overview:

Pure Storage Data Reduction

Explains how data reduction ratios impact storage capacity planning.

FlashArray Capacity Planning Guide:

FlashArray Capacity Planning

Provides guidance on calculating usable capacity based on data reduction ratios.