SnapLock: Unable to extend retention time of WORM file using PowerShell

Applies to

• ONTAP 9
• Data ONTAP 8.2 7-Mode
• Data ONTAP
• SnapLock

Issue

• Unable to extend the retention date of a SnapLock compliance WORM-locked file.
• Unable to modify the file's atime using PowerShell.
• While attempting to extend the retention date of one of these WORM files, by changing the atime of a file to a later timestamp, an error message denying the action is reported. When attempting to change the atime on the file using PowerShell on the file accessed via a CIFS share.

Example PowerShell script is as follows:
$a = Get-Item "z:\test\test2.txt"$a.LastAccessTime = (Get-Date).AddDays(2)$a.IsReadOnly = $true$a.LastAccessTime = (Get-Date).AddDays(5)

• While attempting to run the last command, that updates the atime, the following error is reported:

Exception setting "LastAccessTime": "Access to the path 'Z:\test\test2.txt' is denied."At line:1 char:1+ $a.LastAccessTime = (Get-Date).AddDays(5)+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], SetValueInvocationException + FullyQualifiedErrorId : ExceptionWhenSetting