NETGEAR is aware of an issue when booting ReadyNAS OS 6.4.1 after an upgrade.
You may run into an issue booting the ReadyNAS if you meet the following conditions:
- Using a ReadyNAS with an LCD
- The LCD displays mount_block_root
As of ReadyNAS OS 6.4.1, the ReadyNAS now outputs debug level messages in the event of a low level failure to the LCD.
mount_block_root indicates that there was an issue during boot, specifically related to the location where the ReadyNAS saves your firmware.
Your ReadyNAS is recoverable from this error message. Please see our USB Boot Recovery
Workarounds are implemented in OS 6.4.2 to prevent this error on upgrade.
Last Updated:07/07/2025
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Article ID: 30237