Buffalo NAS Permissions Error

[ElwoodP]

I have a Buffalo Linkstation (LS420) connected to a Mac running Yosemite.

A few folders are suddenly inaccessible. I receive the following error when trying to access them in Finder:
The folder "folder name" can't be opened because you don't have permission to see its contents.

Trying to change the permissions through finder results in an error message:
The operation can't be completed because you don't have the necessary permission.

The Buffalo web admin doesn't seem to have a feature to change permissions for specific files/folders, only for the entire volume.

Could anyone give me advice on how to reset the permissions of the affected folders and what might have caused the problem?

 

[stevech]

Tried it from other devices/computers?

In my (Synology) NAS, permissions are based on user ID, not file properties.

 

[ElwoodP]

Tried it from other devices/computers?

In my (Synology) NAS, permissions are based on user ID, not file properties.

Thanks for your reply stevech. I have tried from a different Mac and still couldn't access the folders.

I also tried setting up a new user and mount the share using those details but still nothing.

However I then thought to just turn off access restrictions for the share and mounted it as a guest (with no username or password). I now have access to the affected folders.

Thats a relief that the data is there. But I don't understand what is happening?

 

[stevech]

Apple-itis?

 

[ElwoodP]

Apple-itis?

Hil-arious

 

[sfx2000]

Thanks for your reply stevech. I have tried from a different Mac and still couldn't access the folders.

Something has happened on the NAS side - most NAS boxes follow the Unix User/Group/World schema for file permissions, and it sounds like either the userID was dropped/lost on the NAS, or somehow got munged within the group/world context...

Contact Buffalo, and I hope you have a fairly recent/complete back up of the NAS just in case things need to be nuked/paved/rebuilt...