QNAP Security VioStor CMS (Version: 1.0.1) - Manual (Page 170)

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Login the CMS Server as an administrator.
Browse and select the firmware for the CMS Server. Click “Start” to update the system.
Note: The CMS servers of the same model on the same LAN can be updated by the QNAP
Finder at the same time. Administrator access is required for system update.