Rob Huffman Sat, 01/19/2008 - 07:20

Hi jianhua,


Dan is most correct here (5 points for your good work Dan!) I just thought that I would add this info for your TAC case. It may speed things up a bit.


CSCsd52483


Controller stuck at grub> prompt


Symptom:


A WLC2006, WLC2106 or NM-AIR-WLC6 may seen to display a "grub>" prompt on the console port. It will be unable to boot the

WLC software and will not be able to operate normally.


Workaround:


Replace the hardware.


Hope this helps! And best of luck.

Rob

taylor.robert Wed, 01/28/2009 - 04:24

Some very good new for everyone who has experienced this very frustrating error. I have found a resolution to this problem (well it fixed my issue, which certainly seems extremely similar to this one)...


Type what you see following the Grub command prompt...


Symptom:


A WLC526, WLC2006, WLC2106 or NM-AIR-WLC6 may seen to display a

"grub>" prompt on the console port. It will be unable to boot the

WLC software and will not be able to operate normally.


Workaround:


For AIR-WLC526 / AIR-WLC2006 / AIR-WLC2106:

From the grub prompt use the following commands to boot primary image


grub> root (hd0,1)


grub> kernel /bzImage-primary root=/dev/ram ramdisk_size=32768 printk=yes

console=ttyS0,9600


grub> initrd (hd0,1)/initrd-primary


grub> boot



From the grub prompt use the following commands to boot secondary image

grub> root (hd0,1)


grub> kernel /bzImage-secondary root=/dev/ram ramdisk_size=32768 printk=yes console=ttyS0,9600


grub> initrd (hd0,1)/initrd-secondary


grub> boot


Then TFTP download an official version of WLC code, to install a bootloader

for the WLC.



This was the fix that I have been searching for - I hope it works for you too.


KR

Rob T.

amiresmailpour Wed, 04/01/2009 - 14:44

Hi guys,


I have the same problem, but the grub does not see (hd0, 1), it can only see (hd0), and when I enter there, and use the kernel command, then the grub gives this error message:

"Error 17: Cannot mount selected partition"


grub cannot do some of the commands, in the help items, there are many options, but in order to do that it needs to mount the kernel.


Any ideas is appreciated.

amir

Leo Laohoo Wed, 04/01/2009 - 16:24

Hi Amir,


1. No spaces in the "(hd0, 1)";

2. If all else fails, raise a Cisco TAC.

amiresmailpour Thu, 04/02/2009 - 06:44

This is what I get:

grub> root (hd0,1)


Error 5: Partition table invalid or corrupt


Regards

Amir

tdennehy Wed, 02/22/2012 - 09:55

I know someone who had this issue.  She took the cover off the controller and saw the compact flash module.  It wasn't seated properly, so she pulled it out and put it back in and closed the unit up.... and it booted. 

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