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VDS_S_UPDATE_BOOTFILE_FAILED
This is a post-storage warning: the disk or volume operation can reach its VDS completion point while the boot-environment update fails. Windows boot configuration is a separate layer. BCDBoot copies boot-environment files to the system partition and creates or updates a BCD store; on UEFI systems it can also update firmware NVRAM entries. A VDS warning at this boundary therefore does not prove that the volume operation itself rolled back.
Why this state matters
Preserve the resulting disk and volume topology before attempting boot repair. Identify the Windows installation, the actual system partition, and the firmware mode, then inspect BCD and boot files independently. Replaying the original migration or mirroring operation is a poor first diagnostic step because it can change partition numbering or plex state again without fixing the boot store that failed to update.
Diagnostic focus
- Confirm the final VDS disk, volume, and plex state before touching boot configuration.
- Identify BIOS versus UEFI boot and locate the system partition that should contain boot files.
- Inspect the BCD store and firmware boot entry rather than relying only on drive letters.
- Use BCDBoot or BCDEdit only after verifying the intended Windows installation and target system partition.
Technical references
MS-VDS error codes · BCDBoot command-line options · BCDEdit command-line options · VDS Volume Object · VDS Pack Object
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