Thanks Nicolas, that sounds very promising, probably something silly is missing, for it is not working,

Yes Nicolas, in the console message during boot i could find the line root=UUID=xxx like:
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 61952
--> [    0.000000] Kernel command line: console=tty0 console=ttyO2,115200n8 root=UUID=17fb7403-3757-4533-b783-7be5436d9882 rootwait ro earlyprintk mpuratM
[    0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)

I tried giving the whole bootargs command in the boot console after interrupting the boot, the situation is still the same.
Result:: 
Environment size: 1276/131068 bytes
--> Overo # setenv bootargs "console=tty0 console=ttyO2,115200n8  root=LABEL=rootfs rootwait ro earlyprintk mpurate=${mpurate} vram=12M"
--> Overo # saveenv
Saving Environment to NAND...
Erasing Nand...
Erasing at 0x240000 -- 100% complete.
Writing to Nand... done
Overo # boot
reading boot.scr

I found the line in boot.txt in the boot partition of the memory card. I did change that line in boot.txt to root=LABEL=rootfs, nothing changed in the kernel command line, it was still as shown above.

I want to know where exactly i have to change the boot args from UUID to LABEL. 

---------------------------------
Sudhangathan BS
Ph:(+91) 9731-905-205
---------------------------------


On Fri, Feb 17, 2012 at 1:01 PM, Dechesne, Nicolas <n-dechesne@ti.com> wrote:


On Fri, Feb 17, 2012 at 8:26 AM, Sudhangathan B S <sudhangathan@gmail.com> wrote:
[    6.605651] usbcore: registered new interface driver usbhid                  
[    6.617279] usbhid: USB HID core driver                                      
Gave up waiting for root device.  Common problems:                             
 - Boot args (cat /proc/cmdline)                                                
   - Check rootdelay= (did the system wait long enough?)                        
   - Check root= (did the system wait for the right device?)                   
 - Missing modules (cat /proc/modules; ls /dev)                                 
ALERT!  /dev/disk/by-uuid/17fb7403-3757-4533-b783-7be5436d9882 does not exist. !

it looks like you are using UUID in the bootargs (root=UUID=xxx) to indicate where the root FS is. You can use a LABEL instead of UUID, root=LABEL=foobar, and make sure that on all your cards the root partition is labelled 'foobar'