Read-only file system when attempting mkdir /data/db on Mac

Cover Image for Read-only file system when attempting mkdir /data/db on Mac
Matheus Mello
Matheus Mello
published a few days ago. updated a few hours ago

🛠️ How to Solve the "Read-only file system" Issue on Mac

So, you're trying to create a new folder in the root directory of your Mac, but no matter what you try, you keep getting the frustrating error message: "mkdir: /data: Read-only file system". 😫

Don't worry, you're not alone! This is a common issue that many Mac users encounter when they attempt to create directories or files in certain locations. In this blog post, we'll explore some easy solutions to this problem and help you get back to creating folders like a pro. 💪

🚫 Why Am I Getting the "Read-only file system" Error?

Before we dive into the solutions, let's quickly understand why you're facing this issue in the first place. The error message indicates that the file system you're trying to write to is currently in a read-only state. This prevents you from making any changes or creating new files or folders.

Your Mac's file system can become read-only due to various reasons, such as:

  1. File System Corruption: If your file system gets corrupted, your Mac might automatically switch it to a read-only mode to prevent further damage.

  2. Incorrect Permissions: The directory you're trying to create a folder in might not have the necessary write permissions.

  3. Mounted Drive: If you're working with an external drive or network storage, it could be mounted as read-only.

Now, let's explore some simple solutions to get you out of this read-only predicament! 😊

💡 Solution 1: Check File System Integrity

To ensure that your file system isn't corrupted and causing the read-only issue, you can use the built-in macOS utility called Disk Utility. Here's how to do it:

  1. Open Disk Utility. You can find it in the /Applications/Utilities/ folder or search for it using Spotlight.

  2. In the left sidebar, select the disk or volume where you're experiencing the problem.

  3. Click on the "First Aid" tab at the top.

  4. Click the "Run" button to start verifying and repairing the disk.

Wait for the process to complete, and if any issues are found and fixed, try creating the folder again. 🕐

💡 Solution 2: Check and Modify Folder Permissions

If the read-only problem persists, it's possible that the folder you're trying to create a directory in doesn't have the correct permissions. To fix this, you can follow these steps:

  1. Locate the directory where you're encountering the issue.

  2. Right-click on the directory and select "Get Info". Alternatively, you can select the directory and press Command + I.

  3. In the Info window that appears, scroll down to the "Sharing & Permissions" section.

  4. If necessary, unlock the settings by clicking on the padlock icon at the bottom right and enter your admin password.

  5. Modify the permissions for your user account (or any other account that needs write access) by clicking on the "+" button, selecting your account from the list, and setting the privilege to "Read & Write".

  6. Finally, click the gear icon at the bottom left of the window and select "Apply to enclosed items". This will apply the permissions changes to all files and folders within the directory.

Try creating the folder again, and hopefully, you won't encounter the read-only error. 🤞

💡 Solution 3: Check External Drives or Network Storage

If you're working with external drives or network storage, the read-only issue might be caused by how they are mounted. Here's what you can do:

  1. Eject the external drive or disconnect from the network storage.

  2. Reconnect the drive or network storage.

  3. If prompted, ensure that you provide the correct credentials to access the drive or network storage.

  4. Retry creating the folder in the desired location.

📢 Take Action and Share Your Experience!

Now that you have some easy solutions to tackle the "Read-only file system" issue on your Mac, it's time to put them into action! Try them out, and if you successfully create the folder, don't forget to share your experience in the comments below. 👇

If you found this blog post helpful, don't hesitate to share it with your friends who might be struggling with the same problem. Together, we can make file system errors a thing of the past! 😉

Happy folder creation! 📂✨

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