| Previous | Next |
| STATUS_SVHDX_ERROR_NOT_AVAILABLE | STATUS_SVHDX_UNIT_ATTENTION_CAPACITY_DATA_CHANGED |
STATUS_SVHDX_UNIT_ATTENTION_AVAILABLE
The initiator must refresh its view of shared storage state
STATUS_SVHDX_UNIT_ATTENTION_AVAILABLE reports a SCSI Unit Attention condition for the initiator. Unit Attention is a state-change notification, not a durable classification of the disk as failed. It can signal that capacity, reservation, registration, or another device characteristic changed while this initiator was not current.
The safe response is to obtain the detailed condition and refresh the affected state before resuming cached I/O assumptions. Treating it as an ordinary retry can reuse obsolete capacity, reservation, or connection information in a guest cluster.
What to verify
- Collect the associated sense data and identify the specific Unit Attention subcondition.
- Refresh capacity, topology, and persistent-reservation state as indicated by the detailed condition.
- Coordinate recovery through the clustered workload rather than independently resuming writes from every VM.
References
- Microsoft: VHD Set files for guest clusters
- Microsoft: RawSCSIVirtualDisk
- T10: SCSI unit-attention condition handling
Looking for a different code? Search another status or error code.