Replacing a Drive in Your Synology NAS: Step-by-Step Instructions

Replacing a Drive in Your Synology NAS: Step-by-Step Instructions


Replacing a drive in your Synology NAS is a straightforward process that ensures the smooth operation and reliability of your storage system. This step-by-step guide will provide you with detailed instructions on how to efficiently replace a faulty drive, minimizing any potential downtime and data loss.

Step 1: Identify the Faulty Drive

To begin, access the DiskStation Manager (DSM) interface on your Synology NAS. Navigate to the Storage Manager and take note of any drive(s) labeled with a warning or error status. This will help you identify the specific drive that needs replacement.

Step 2: Prepare the Replacement Drive

Before proceeding, ensure you have a compatible replacement drive. Refer to your Synology NAS model's specifications to determine the supported drive types and capacities. Acquire a new drive that matches these requirements.

Once you have the replacement drive, prepare it by formatting it using the recommended file system. This can generally be done within the DSM interface, under Storage Manager > HDD/SSD section.

Step 3: Make a Backup (Optional)

Although not mandatory, it is highly recommended to create a backup of your data before replacing the drive. This step helps prevent any potential data loss during the replacement process. Use your preferred backup method, such as external storage or cloud services.

Step 4: Safely Power Down the NAS

Now that you have everything prepared, it's time to turn off your Synology NAS properly. Within the DSM interface, go to Control Panel > Hardware & Power, and select "Shut Down." Allow the NAS to power down completely before proceeding to the next step.

Step 5: Physically Replace the Faulty Drive

With the NAS powered off, carefully remove the faulty drive from the NAS drive bay. Follow the manufacturer's guidelines to ensure a safe removal process. Once the old drive is removed, insert the new drive into the vacant slot, making sure it is correctly aligned.

Step 6: Power On and Initialize the Replacement Drive

After inserting the replacement drive, power on your Synology NAS. Access the DSM interface and navigate to Storage Manager. Go to the HDD/SSD section and select "Manage," followed by "Repair" or "Add." This will initiate the process of initializing the replacement drive and rebuilding the RAID configuration.

The time required for initialization and rebuild varies based on the size of the drives and the amount of data stored. It is normal for this process to take several hours to complete, during which the system may experience reduced performance.

Step 7: Verify the Replacement

Once the rebuild process is finished, confirm that the new drive is functioning properly. Check the Storage Manager in the DSM interface to ensure the status of the replacement drive is displayed as "Normal" or "Healthy."

If any issues persist or if the replacement drive does not appear as expected, consult the Synology support documentation or contact their customer support for further assistance.


By following these step-by-step instructions, you can successfully replace a faulty drive in your Synology NAS without significant downtime or data loss. Regularly monitoring your drives' health and promptly replacing any faulty ones ensures the ongoing reliability and performance of your storage system.

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