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ERROR_SPACES_NUMBER_OF_DATA_COPIES_INVALID
Data copies describe complete copies, principally for mirror layouts
ERROR_SPACES_NUMBER_OF_DATA_COPIES_INVALID means NumberOfDataCopies cannot be applied to the chosen resiliency setting, pool, or topology. It normally expresses how many complete copies of user data a mirrored virtual disk should maintain; it is not a parity-fragment count.
A three-copy mirror requires placement resources beyond simply three visible drives. Copies must be distributed according to the active fault-domain policy, and explicit copy counts can conflict with a resiliency setting or other overrides.
Checks for a valid mirror request
- Confirm that the selected resiliency setting supports a data-copy parameter.
- Compare the requested count with provider-reported minimum and maximum values.
- Verify enough eligible disks and fault domains exist for every copy.
- Remove a simultaneous
PhysicalDiskRedundancyoverride if it expresses a conflicting layout. - Check tier definitions when the virtual disk spans multiple media types.
- Do not use data-copy count to request single or dual parity.
References
- Microsoft: MSFT_StoragePool.CreateVirtualDisk
- Microsoft: New-VirtualDisk data-copy examples
- Microsoft: Storage Spaces resiliency
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