Version 6.6 235 October 2014
Installation & Operation Manual 27. Working with the SC Boards
8. The SC board will reboot and the Linux OS will be automatically re-installed on it.
The re-installation process will typically take approximately 15 minutes. During
this time, the SC board will be inaccessible via the network and you may
optionally use the RS-232 console to monitor the re-installation progress. When
the re-installation has completed, the SC board will reboot again and you will be
able to connect to it via the IP network using the IP address and passwords
provided in previous steps.
27.7.4 Re-installing the Linux OS via the RS-232 Serial Console
When the SC board that is required to be re-installed is unable to boot the currently
installed version of the Linux OS, however its bootloader is not damaged (the GRUB
menu is displayed in the RS-232 console when the SC board attempts to boot), use
the method described in this section to perform Linux OS re-installation via the RS-
232 serial console.
The Linux OS will be re-installed from a local copy of the OS installation image that
was created during the initial OS installation on the SC board and is stored on a
hidden partition. An RS-232 serial console connection to the SC board is required to
perform this type of OS re-installation.
To re-install the Linux OS via the RS-232 Serial Console:
1. Connect to the SC board via the RS-232 Serial Console (see 'Command Line
Interface' on page 107).
2. Restart the SC board by pressing the hidden “Reset” pin, located on the SC
board’s front panel or by extracting and re-inserting the SC board into the
Mediant 8000 chassis slot.
3. When the GRUB menu is displayed, press the Space key to pause the boot
process. Make sure to press the key within 5 seconds after the menu is
displayed, otherwise the boot process will continue as normal.
GNU GRUB version 0.97 (629K lower / 2083729K upper memory)
+-------------------------------------------------------------+
| CentOS (2.6.18-128.1.14.el5) |
| Re-install Linux OS |
| Rescue Console |
| |
| |
+-------------------------------------------------------------+
Use the ^ and v keys to select which entry is highlighted.
Press enter to boot the selected OS or 'p' to enter a
password to unlock the next set of features.
4. Press p and enter the GRUB security password (grub_12345 by default) to
unlock the advanced GRUB features.
Password: **********
5. Press the “Down” arrow key to choose the “Re-install Linux OS” menu item and
press Enter to activate it.
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