When the auto-upgrade process cannot find the appropriate stack member software to copy to the switch in voicemail (VM) mode, the auto-advise process tells you the command, which is the archive copy-sw or archive download-sw privileged EXEC command, and the image name (tar filename) needed in order to manually upgrade the switch stack or the switch in VM mode.
The recommended image can be the running switch stack image or a tar file in any flash file system in the switch stack, which includes the switch in VM mode. Auto-advise cannot be disabled, and there is no command to check its status.
The Unable to create temp dir "flash:update" error message appears because an update to the temp file is created when a failure is experienced.
In order to resolve this issue, complete these steps:
Use thermdir flash:update command in order to delete the temp file.