Storage Spaces can thin provision disks larger than space

With traditional fixed provisioning, pre-allocated space is not available in the storage pool. With thin provisioning, space is allocated from the pool when needed and volumes can be over-provisioned (size larger than available capacity) to ...

Windows Server logs a system event to alert the system administrator of the provisioning type or LUN capacity change. A thin provisioning LUN is usually created with less physical disk space than the size of the LUN.

Get-StorageTier <mirror tier> | ... <mirror tier,parity tier> -StorageTierSizes 200GB,800GB ... In Cluster Manager, select Settings from the lower left. In the Settings pane, select Storage Spaces and pools....

However, as a result of the thinly provisioned disk, the underlying physical storage needed will only grow and never shrink. This is because sections of the physical storage have been allocated to the virtual disk, even if the storage on the ...

With a thin virtual disk, the disk size value shows how much space is provisioned and guaranteed to the disk. At the beginning, the virtual disk might not use the entire provisioned space. The actual storage use value can be less than the size of the virtual disk.

Therefore, with thin provisioning a 50GB device, with 10GB of data written to it, only consumes 10GB of physical disk space. When working with thin provisioning, it is important to remember that the host is unaware if a LUN is thick or thin.

Hi,I inherited the current VMware environment and notice there is a VM that was thin-provisioned with 100GB and the actual used storage in vCenter shows it's 15

You can create a virtual disk with a greater maximum size than the physical space you have available (“overprovisioning”) and add more physical storage in the future, but remember that if the physical disk space fills up and the thin-provisioned ...

5 x 3TB is 15TB, larger than your 10TB of actual capacity. Doesn't make sense right? But those 5 volumes might only have 10-50GB of space in real data stored in them and maybe one has 2TB in it, totaling all together only 3TB of real data on the disk. 3TB is less than 10TB so you're good. Problem is that as you reach the actual physical disk capacity, those 5 x 3TB volumes you created won't appear to be full even though the storage spaces system knows you're running out so you need to add more physical disk space to the storage spaces configuration/pool.