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Linux 3.2 USB booting Problem



Hi,

I am trying to boot AM335x EVM using Linux 3.2 kernel version, i have enabled the usb supported drivers in the kernel but it shows error as 

[ 2.854278] VFS: Cannot open root device "sda2" or unknown-block(8,2)
[ 2.861022] Please append a correct "root=" boot option; here are the available partitions:
[ 2.869781] 1f00 128 mtdblock0 (driver?)
[ 2.875091] 1f01 128 mtdblock1 (driver?)
[ 2.880371] 1f02 128 mtdblock2 (driver?)
[ 2.885650] 1f03 128 mtdblock3 (driver?)
[ 2.890930] 1f04 1920 mtdblock4 (driver?)
[ 2.896209] 1f05 128 mtdblock5 (driver?)
[ 2.901489] 1f06 5120 mtdblock6 (driver?)
[ 2.906768] 1f07 254464 mtdblock7 (driver?)
[ 2.912048] b300 3872256 mmcblk0 driver: mmcblk
[ 2.917602] b301 72261 mmcblk0p1 00000000-0000-0000-0000-000000000000
[ 2.925415] b302 3791340 mmcblk0p2 00000000-0000-0000-0000-000000000000
[ 2.933227] 0800 3872256 sda driver: sd
[ 2.938079] 0801 72261 sda1 00000000-0000-0000-0000-000000000000
[ 2.945434] 0802 3791340 sda2 00000000-0000-0000-0000-000000000000
[ 2.952789] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,2)

Can any one please tell me where i am going wrong, i have attached complete log in the attachments.

6136.log-usb.txt