# SMART and Badblocks Testing Script

This script performs diagnostic tests on a specified block device using `smartctl` and `badblocks`. It enables SMART, checks device health, runs various SMART tests, and conducts a non-destructive write test.

## Prerequisites

Ensure the following dependencies are installed on your system:
- `smartctl` (part of the `smartmontools` package)
- `badblocks`

## Usage

```bash
./smartdrivecheck.sh <device>
```

- `<device>`: The block device to test (e.g., `/dev/sda`).

### Example

```bash
./smartdrivecheck.sh /dev/sda
```

## Script Workflow

1. **Dependency Check**
   - Verifies that `smartctl` and `badblocks` are installed and executable.

2. **Device Validation**
   - Ensures the specified device is a valid block device.

3. **Enable SMART**
   - Enables SMART on the device if it is not already enabled.

4. **SMART Data Checks**
   - Runs a series of checks on existing SMART data, including health status, error logs, and self-test logs.

5. **Polling Time Extraction**
   - Extracts polling times for various SMART self-tests (short, extended, and conveyance).

6. **Self-Tests**
   - Depending on available polling times, performs conveyance, short, or extended tests, waiting for their completion.

7. **Non-Destructive Write Test**
   - Uses `badblocks` to perform a non-destructive write test on the device.

8. **Final Extended Test**
   - If applicable, performs a final extended SMART test.

## Environment Variables

During execution, the script extracts the following variables based on device capabilities:
- `CONVEYANCE_SLEEP`: Estimated time (in minutes) for the conveyance test.
- `SHORT_SLEEP`: Estimated time (in minutes) for the short test.
- `EXTENDED_SLEEP`: Estimated time (in minutes) for the extended test.

## Notes

- **Non-Destructive Testing**: The script ensures that the write test is non-destructive, preserving existing data on the device.
- **SMART Compatibility**: This script assumes the device supports SMART. Ensure your device is compatible before running the script.

## Error Handling

- The script terminates if any critical error occurs during execution.
- Specific error messages will be printed to `stderr`.

## License

This script is open source and available under the AGPL License. See attached License.

## Disclaimer

Use this script at your own risk. Always back up your data before performing diagnostics or tests on storage devices.