Home > Questions

First Aid could not unmount one of the other volumes in the volume's container

A few weeks ago, I received an alert about my Western Digital My Passport Ultra for Mac. But I didn't take notes about it. I then ran First Aid to check if it had disk errors, but the process failed with the messages "First Aid could not unmount one of the other volumes in the volume's container." and "Unable to unmount volume for repair. : (-69673)." How can I fix it? BTW, I'm running macOS Monterey.

Best Answered by

iBoysoft author Jenny Zeng

Jenny Zeng

Answered on Monday, February 19, 2024

If First Aid can't unmount one of the other volumes in the volume's container, you can manually unmount it and attempt to use First Aid again. Here are two ways to do it:

① Select the drive in Disk Utility and click Unmount.

② Run the following commands in the Terminal app:

Get the drive's disk identifier with this command:

diskutil list

Then replace disk_identifier and run the following command: (e.g., diskutil unmountDisk /dev/disk2)

diskutil unmountDisk /dev/disk_identifier

If First Aid still can't unmount the volume for repair, consider erasing it after backing up its data if the drive is accessible. For those who can't access their drive, they can use iBoysoft Data Recovery for Mac to get the essential files back.

Read this guide to learn more solutions: How to Fix 'Unable to unmount volume for repair 69673' on Mac?

People Also Ask

Read More Questions

Read More Advice From iBoysoft's Computer Experts

Externe Festplatte wird nicht auf dem Mac montiert

Externe Festplatte wird auf macOS Sonoma/Ventura nicht gemountet

8 effektive Lösungen, um die externe Festplatte nicht auf macOS Sonoma/Ventura/Monterey/Big Sur zu mounten, und verlorene Daten von nicht eingehängter externer Festplatte auf dem Mac wiederherzustellen.

Tipps zur Mac-Datenwiederherstellung

marca de sol de brillo

Cómo ajustar el brillo en MacBook Pro/Air y Mac mini?

¿Te preguntas cómo cambiar la configuración de brillo en MacBook/Mac mini? Aprende varias formas útiles de ajustar el brillo de la pantalla con o sin teclado en macOS. 

photos library in finder

How to Move Photos Library to External Hard Drive on Mac

Read this post to know how to move the Photos Library to an external hard drive on Mac step by step to save space on Mac or make a copy of Photos Library.

News Tips