Problem
A NAS permissions change makes existing media readable but prevents creation of render files in the same project directory.
Solution
Root Cause / Diagnostic:
POSIX file permissions and Windows/NFS ACLs distinguish between read/execute permissions and write/create/delete permissions. When an administrator applies a recursive read-only permission update or inherits restrictive parent ACLs across a media folder, editing applications can play back source clips but fail with "Write Permission Denied" errors when attempting to generate render caches or export files.
Actionable Fix:
1. Recursive ACL Modification: On the NAS storage dataset, update permissions to grant the editing user group full Read, Write, and Execute (0775 / Full Control) permissions recursively across all project directories.
2. Default Inheritance Rule Enforcement: Configure POSIX ACL inheritance (`setfacl -d -m g:editors:rwx [dir]`) or Windows Advanced Security Inheritance to ensure all newly created folders inherit full write permissions.
3. Write Access Verification Test: Touch a test file from the workstation terminal (`touch /Volumes/Share/Project/test.tmp`) to confirm write and delete capabilities within the render target directory.
Pro Tip:
If your NLE can read footage but crashes when rendering to the project folder, your user group is missing write permissions; apply recursive Read/Write/Execute permissions and verify folder inheritance.
POSIX file permissions and Windows/NFS ACLs distinguish between read/execute permissions and write/create/delete permissions. When an administrator applies a recursive read-only permission update or inherits restrictive parent ACLs across a media folder, editing applications can play back source clips but fail with "Write Permission Denied" errors when attempting to generate render caches or export files.
Actionable Fix:
1. Recursive ACL Modification: On the NAS storage dataset, update permissions to grant the editing user group full Read, Write, and Execute (0775 / Full Control) permissions recursively across all project directories.
2. Default Inheritance Rule Enforcement: Configure POSIX ACL inheritance (`setfacl -d -m g:editors:rwx [dir]`) or Windows Advanced Security Inheritance to ensure all newly created folders inherit full write permissions.
3. Write Access Verification Test: Touch a test file from the workstation terminal (`touch /Volumes/Share/Project/test.tmp`) to confirm write and delete capabilities within the render target directory.
Pro Tip:
If your NLE can read footage but crashes when rendering to the project folder, your user group is missing write permissions; apply recursive Read/Write/Execute permissions and verify folder inheritance.