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Added drive capacities in case that helps
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Dave
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I have a Storage Spaces array in Windows 10 consisting of 7 SATA HDDs ranging from 3TB -> 8TB each (-edit- for completeness, those drive capacities are: {3, 4, 4, 4, 4, 8, 8}).

I'm trying to understand the Storage Spaces capacity values, shown below:

Change UI for Storage Spaces in Win 10

The section above the drive Name & Letter makes sense in isolation:

  • 15 TB
    • defined size, with thin provisioning allowing it to exceed actual available capacity
  • Using 14.6 TB pool capacity
    • the actual available configured capacity

And the 31.8 TB "Total pool capacity" makes complete sense as the sum of the actual disk capacity from each drive.

But...

  1. Why is only 14.6 available?
  • I've defined my size as 15 TB
  • It says I have 17.2 TB available
  1. What's the relationship here of the 22.5 TB "Including resiliency"?
  2. What is my actual real max configurable usable capacity?
  • I expected to have around 20 TB (66% of 32) - so I'm guessing it's actually only 17.2, but then see question #1

I have a Storage Spaces array in Windows 10 consisting of 7 SATA HDDs ranging from 3TB -> 8TB each.

I'm trying to understand the Storage Spaces capacity values, shown below:

Change UI for Storage Spaces in Win 10

The section above the drive Name & Letter makes sense in isolation:

  • 15 TB
    • defined size, with thin provisioning allowing it to exceed actual available capacity
  • Using 14.6 TB pool capacity
    • the actual available configured capacity

And the 31.8 TB "Total pool capacity" makes complete sense as the sum of the actual disk capacity from each drive.

But...

  1. Why is only 14.6 available?
  • I've defined my size as 15 TB
  • It says I have 17.2 TB available
  1. What's the relationship here of the 22.5 TB "Including resiliency"?
  2. What is my actual real max configurable usable capacity?
  • I expected to have around 20 TB (66% of 32) - so I'm guessing it's actually only 17.2, but then see question #1

I have a Storage Spaces array in Windows 10 consisting of 7 SATA HDDs ranging from 3TB -> 8TB each (-edit- for completeness, those drive capacities are: {3, 4, 4, 4, 4, 8, 8}).

I'm trying to understand the Storage Spaces capacity values, shown below:

Change UI for Storage Spaces in Win 10

The section above the drive Name & Letter makes sense in isolation:

  • 15 TB
    • defined size, with thin provisioning allowing it to exceed actual available capacity
  • Using 14.6 TB pool capacity
    • the actual available configured capacity

And the 31.8 TB "Total pool capacity" makes complete sense as the sum of the actual disk capacity from each drive.

But...

  1. Why is only 14.6 available?
  • I've defined my size as 15 TB
  • It says I have 17.2 TB available
  1. What's the relationship here of the 22.5 TB "Including resiliency"?
  2. What is my actual real max configurable usable capacity?
  • I expected to have around 20 TB (66% of 32) - so I'm guessing it's actually only 17.2, but then see question #1
Source Link
Dave
  • 183
  • 1
  • 1
  • 10

Understanding Storage Spaces capacity descriptions

I have a Storage Spaces array in Windows 10 consisting of 7 SATA HDDs ranging from 3TB -> 8TB each.

I'm trying to understand the Storage Spaces capacity values, shown below:

Change UI for Storage Spaces in Win 10

The section above the drive Name & Letter makes sense in isolation:

  • 15 TB
    • defined size, with thin provisioning allowing it to exceed actual available capacity
  • Using 14.6 TB pool capacity
    • the actual available configured capacity

And the 31.8 TB "Total pool capacity" makes complete sense as the sum of the actual disk capacity from each drive.

But...

  1. Why is only 14.6 available?
  • I've defined my size as 15 TB
  • It says I have 17.2 TB available
  1. What's the relationship here of the 22.5 TB "Including resiliency"?
  2. What is my actual real max configurable usable capacity?
  • I expected to have around 20 TB (66% of 32) - so I'm guessing it's actually only 17.2, but then see question #1