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ERROR_DEVICE_UNREACHABLE
The target device is unreachable
ERROR_DEVICE_UNREACHABLE indicates that the request cannot reach the intended storage or hardware endpoint. The device may be offline, removed, disconnected, or inaccessible through the selected path.
Checks
- Confirm power, cabling, link state, and device presence.
- Review Plug and Play, storage, and controller events.
- For multipath systems, test alternate paths and path policy.
- Re-enumerate only after physical or transport state has stabilized.
Recovery
Restore connectivity or fail over to a healthy path. Applications should surface the I/O failure rather than pretending that a write completed.
References
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