# smartctl -a /dev/nvme4 -j
{
  "json_format_version": [
    1,
    0
  ],
  "smartctl": {
    "version": [
      7,
      3
    ],
    "svn_revision": "5338",
    "platform_info": "x86_64-linux-6.11.0-8-generic",
    "build_info": "(local build)",
    "argv": [
      "smartctl",
      "-a",
      "/dev/nvme4",
      "-j"
    ],
    "exit_status": 0
  },
  "local_time": {
    "time_t": 1760534169,
    "asctime": "Wed Oct 15 13:16:09 2025 UTC"
  },
  "device": {
    "name": "/dev/nvme4",
    "info_name": "/dev/nvme4",
    "type": "nvme",
    "protocol": "NVMe"
  },
  "model_name": "SAMSUNG MZVL22T0HBLB-00B00",
  "serial_number": "S677NX0W610216",
  "firmware_version": "GXB7801Q",
  "nvme_pci_vendor": {
    "id": 5197,
    "subsystem_id": 5197
  },
  "nvme_ieee_oui_identifier": 9528,
  "nvme_total_capacity": 2048408248320,
  "nvme_unallocated_capacity": 0,
  "nvme_controller_id": 6,
  "nvme_version": {
    "string": "1.3",
    "value": 66304
  },
  "nvme_number_of_namespaces": 1,
  "nvme_namespaces": [
    {
      "id": 1,
      "size": {
        "blocks": 4000797360,
        "bytes": 2048408248320
      },
      "capacity": {
        "blocks": 4000797360,
        "bytes": 2048408248320
      },
      "utilization": {
        "blocks": 3983652080,
        "bytes": 2039629864960
      },
      "formatted_lba_size": 512,
      "eui64": {
        "oui": 9528,
        "ext_id": 782518185703
      }
    }
  ],
  "user_capacity": {
    "blocks": 4000797360,
    "bytes": 2048408248320
  },
  "logical_block_size": 512,
  "smart_support": {
    "available": true,
    "enabled": true
  },
  "smart_status": {
    "passed": true,
    "nvme": {
      "value": 0
    }
  },
  "nvme_smart_health_information_log": {
    "critical_warning": 0,
    "temperature": 40,
    "available_spare": 100,
    "available_spare_threshold": 10,
    "percentage_used": 9,
    "data_units_read": 59450771,
    "data_units_written": 261440925,
    "host_reads": 3393806687,
    "host_writes": 11197368558,
    "controller_busy_time": 8610,
    "power_cycles": 2,
    "power_on_hours": 4557,
    "unsafe_shutdowns": 0,
    "media_errors": 0,
    "num_err_log_entries": 0,
    "warning_temp_time": 0,
    "critical_comp_time": 0,
    "temperature_sensors": [
      40,
      48
    ]
  },
  "temperature": {
    "current": 40
  },
  "power_cycle_count": 2,
  "power_on_time": {
    "hours": 4557
  }
}

# echo $?
0