As you can see from looking at the Free column, there isn’t an array with 10TB of free space. That’s a problem. Fortunately, VSI has a solution. One of the key pieces of information that VSI provides is the amount of Orphaned Space contained in each storage array. Orphaned Space is defined as LUNs in a storage array that have been created but are not currently assigned to any hosts. We can see from the listing that one of the arrays has 40TB of Orphaned Space. In this case, 40TB of storage had been allocated to a project that was later cancelled. The 40TB of storage was never reclaimed. The LUNs simply sat in the array and showed up as ‘Allocated’ but were, in fact, not being used.
To confirm the availability of the orphaned space, we can drill down into array details and see a list of orphaned LUNs. From here, we can identify which LUNs can be reclaimed through deletion and/or reassignment.
In less than 3 minutes, VSI helped this customer identify available space avoid spending $125,000 on new storage.