Recovering From A Failed Start On The Z9000 System - Dell Z9000 Configuration Manual

Recovering from a Failed Start on the Z9000 System

A system that does not start correctly might be attempting to boot from a corrupted Dell Networking OS
image or from a mis-specified location.
In this case, you can restart the system and interrupt the boot process to point the system to another
boot location. Use the set command, as described in the following steps. For details about the set
command, its supporting commands, and other commands that can help recover from a failed start, the
GRUB chapter in the Dell Networking OS Command Line Reference Guide.
1. Power-cycle the chassis (pull the power cord and reinsert it).
2. Press the ESC key when the following message appears: Press Esc to stop autoboot...
(during bootup)
Press ESC key
3. Use the arrow keys to select "Force10 Boot" from the list, then press the "C" key to enter GRUB CLI
mode. The command prompt changes to grub>.
GRUB mode
4. Set the Primary Boot Parameter.
GRUB mode
set primary_boot='f10boot location'
5. (Optional) Set the Secondary and Default Boot parameters.
GRUB mode
set secondary_boot='f10boot location'
set default_boot='f10boot location'
6. Save all variables individually.
GRUB mode
save_env primary_boot
save_env secondary_boot
save_env default_boot
NOTE: This command must be used once for each environment variable. If this step is not
completed, the chassis reboots continually.
7. Reboot the chassis.
GRUB mode
reboot
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