You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Volume being mounted twice, showing up in finder as "Read Only"

I have an external buffalo drive.

Since updating its filesystem to APFS, it began mounting 2 versions of the drive.

One called "Buffalo 1TB" and one called "Buffalo 1TB - Data".

As far as I can tell, they are identical except that "Buffalo 1TB" is mounted as a read only filesystem.

The volume with the "- Data" on it, is read/write... but in Finder, only the read-only file system is being displayed.


Going to disk utility I see the screen shots attached.


I would like to eliminate the duplicate mounting and make sure the only mounted version of the filesystem is R+W. Can anyone assist?

MacBook Pro 16″, macOS 12.0

Posted on Jan 13, 2022 8:23 AM

Reply
Question marked as Top-ranking reply

Posted on Jan 13, 2022 8:38 AM

Are you booting from the external Buffalo drive? It appears to be a startup disk

It is not a duplicate. The read only is a sealed volume of the basic operating system and can't be changed by the user. The Data one is that one that is read-right. The non-data one does not show in Finder


Also see:

https://eclecticlight.co/2021/01/09/boot-disk-layout-on-intel-and-m1-macs-high-sierra-to-big-sur/

Similar questions

1 reply
Question marked as Top-ranking reply

Jan 13, 2022 8:38 AM in response to savante

Are you booting from the external Buffalo drive? It appears to be a startup disk

It is not a duplicate. The read only is a sealed volume of the basic operating system and can't be changed by the user. The Data one is that one that is read-right. The non-data one does not show in Finder


Also see:

https://eclecticlight.co/2021/01/09/boot-disk-layout-on-intel-and-m1-macs-high-sierra-to-big-sur/

Volume being mounted twice, showing up in finder as "Read Only"

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.