What does HRESULT 0x80042464 (VDS_E_ONLINE_PACK_EXISTS) mean?

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VDS refused to create a pack because the software provider already has an online pack.

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VDS_E_ONLINE_PACK_EXISTS

VDS_E_ONLINE_PACK_EXISTS The VDS dynamic-disk model uses an online primary pack/disk group for active configuration. Microsoft’s foreign-disk import procedure says to select the online pack as the target; if no online pack exists, create a new empty pack. VDS_E_ONLINE_PACK_EXISTS is the inverse guard: creation fails because an online pack already exists.

What the VDS state means

This is not an “object name already exists” condition. Pack identity and status are explicit in VDS_PACK_PROP. The application should enumerate packs and use the existing online pack where the operation permits it, rather than repeatedly trying to create another primary container.

Diagnostic focus

Call QueryPacks and inspect VDS_PACK_PROP.status to identify the existing online pack.
For foreign-disk import, follow the documented workflow and migrate the disks into the selected online pack instead of creating a second online pack.
Keep this error separate from VDS_E_DUP_EMPTY_PACK_GUID; one is about an existing online pack, the other about an empty-pack GUID conflict.
If the application expected no online pack, refresh the VDS view and investigate stale provider state or another storage-management process that created the pack.

Technical references

VDS common return codes · MS-VDS error codes · Adding foreign disks to a pack · IVdsSwProvider::QueryPacks · VDS_PACK_PROP

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