Hello Team,  one FS9200 provisioned behind TWO SVC clusters, configured with one Pool and one MDISK
Physical Capacity is 138.01TiB and available from Physical Capacity 92.74TiB, However  for MDisk Capacity total is 318TiB and free is 50TiB
Is there any way to increase the capacity provisioned to SVC as the actual physical capacity usage is only 33%
by other words,  how to utilize the the available physical capacity. 

Physical capacity : 138 Tib    used : 45.27 (33%)   available 92.74 TiB(67%) 

MDisk capacity :  318 TiB  Used 268 Tib (84%)  free capacity 50TiB (16%)

volume capacity : 268 TiB  Used (100%)

Pool :  138 Tib    used : 45.27 (33%)   available 92.74 TiB(67%) 

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Hazem Hamed
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From the data you show that FS9200 allocated 268 TiB vdisks and only used 45.27 TiB physical capacity. The compression ratio is close to 6. It's higher than the fixed compression ratio on FCM drives. You can create new vdisks(50 TiB) to SVC so applications can save 300 TiB data with the compression ratio 6. But you can't used all of physical space on FS9200 because there is fixed ratio on FCM drives. 

The solution is using DRP on SVC side. If you allocated several disks to SVC,  you maybe can migrate the data from existing pool to new DRP pool, then remove old mdisks from existing regular pool. That will spend times but can help to utilize all of physical capacity on FS9200 finally.

Hope this can help.