Newisys NA-1400, Руководство пользователя

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Configuring Advanced Settings
44 NA-1400
Note: It is not necessary to activate or deactivate USB drives when you make backup
copies of system files. For storage use, these operations are mandatory.
Restore Broken System Files
If the NA-1400 does not boot, restore the system files that previously were saved on the USB drive.
Notes: Do not leave the USB drive connected when the restore is complete. It can lead to
an improper device detection at boot and cause error alarms on the status page in
the Web interface. (User data should remain intact in this case.)
You might lose current settings of the NA-1400, since they will be overwritten by
an older backup copy from an USB drive. (User data should remain intact in this
case.)
To restore system files:
1. Ensure that the NA-1400 is powered off.
2. Connect a USB drive, that has a backup copy of system files, to any free USB port of the NA-1400.
3. Power on the NA-1400. As the NA-1400 begins to boot, the blue LED that is next to the power switch
begins to flash in a series of rapid flashes.
4. While the blue LED flashes, quickly press the power switch. The restore process begins and the blue
LED no longer is illuminated.
When the blue LED begins to flash again then stays on continually, the restore process is complete.
5. Disconnect the USB drive. The NA-1400 continued to boot. When boot is complete, you can use the
NA-1400.
Note: If the restore process results in slow flashes of the blue LED, the restore has
failed.
The restore function is not capable of restoring the broken system partitions. It can
restore only broken system files.
Provide Access over USB Console
It is possible to access NA-1400’s console over a USB, with an appropriate USB Host-to-Host Bridge
cable.
To access the console over a USB, under Linux:
1. Connect one end of a USB cable to a USB port on the NA-1400.
2. Connect the other end of the USB cable to a client PC.
3. If your Linux distribution features hot-plug functionality, the cable should be detected automatically.
Otherwise, see "Load Module Manually" on page 45.
4. A new device appears in the system:
/dev/ttyUSB0