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Pegasus R12 Thunderbolt Connection and Sleep Mode Behavior for Pegasus R12
Babatunde Akinkuolie posted this 31 October 2024 - Last edited 31 October 2024

When the Thunderbolt connection to the Pegasus R12 is interrupted—either by powering off or restarting the connected Mac, or physically disconnecting the Thunderbolt cable—the Pegasus R12 will enter sleep mode rather than a complete shutdown.

This means the Pegasus R12 remains powered on but in a low-power state, ready to quickly resume operation when the Thunderbolt connection is restored.

Important Points
Interruption scenarios: The Pegasus R12 will enter sleep mode in the following cases:
- The connected Mac is powered off or restarted.
- The Thunderbolt cable is disconnected from the Pegasus R12.
- Not a complete shutdown: Entering sleep mode does not fully power down the device. To fully shut down the Pegasus R12, follow the shutdown procedures using either PROMISE Utility Pro or the Power Button as described here.

Note: Always ensure volumes are ejected or dismounted properly before disconnecting the Thunderbolt connection to avoid data issues.

Pegasus R12 How to Safely Shut Down the Pegasus R12
Babatunde Akinkuolie posted this 31 October 2024 - Last edited 31 October 2024

Before proceeding with shutdown, always eject or dismount the connected Pegasus R12 volume(s). This ensures data integrity and safe power-down of the storage system.

Option 1: Using PROMISE Utility Pro

1. Open PROMISE Utility Pro.

2. Go to the Controls menu and click on the Device.

3. Click the Power Button icon and select Shut down the device.

4. A warning dialog will appear to prevent accidental shutdown. If your Pegasus R12 is part of a daisy chain (connected via Thunderbolt to other devices), those devices will also shut down.

5. Wait a few minutes for the shutdown process to complete. The Power Button LED on the front will light red during shutdown. Once the LED is off, you can safely disconnect the power cord.

Option 2: Using the Power Button

1. Eject or dismount the connected Pegasus R12 volume(s) first.
- On Mac, drag the volume icon into the Trash/Eject symbol, or right-click and choose Eject.
2. Touch and hold the Power Button on the device for about four seconds.
3. The shutdown process will begin, lighting the Power Button LED red during shutdown. Any devices connected via Thunderbolt behind the R12 will also enter shutdown mode.
4. Once the LED turns off, it’s safe to disconnect the power cord if needed.

Important: Always eject or dismount connected volumes before shutting down to prevent data loss or corruption.

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