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The yellow marked area in Figure 10-2 reflects the theoretical maximum effective capacity . The bold cell line shows when the maximum effective capacity is reached, regardless of compression ratio. See the best practices document linked here, which will have the most current information: 

https://www.ibm.com/support/docview.wss?uid=ibm10735459 

## Example 1: 

GLYPH<SM590000> Installed is AE3 with 12 Extra Large Flash Modules. 

GLYPH<SM590000> Comprestimator was not used and it is not known if data is compressible 

Looking at Figure 10-1 max effective capacity for 1:1 at 85% is 139.1 TiB. This should be the total of provisioned capacity configured on this system. When data is stored, you can check the actual compression ratio. 

## Example 2 for a different configuration: 

GLYPH<SM590000> Installed is AE3 with 8 Medium Flash Modules.(which after RAID give 6 modules worth of usable capacity). 

GLYPH<SM590000> Actual compression ratio is 1.8:1. 

The following effective capacity calculation is made: usable (physical) capacity (6 x 7.7 TB) x compression ratio 1.8 = 83.16 TiB . Following the recommendation to not exceed 85% = 70.63 TiB. 

