booting from USB

Hi all,

I am working on GESBC 9260 board with u-boot version: 'U-Boot 1.3.3 (Jan 7 2010 - 12:36:50)'.

I am trying to boot from the SanDisk 2GB per-drive. I made two partitions on the drive, one of 500MB with ext3 partition and 1.4GB with FAT32 partitions.

I have copied the Debian rootfs onto ext3 partition. I have copied the uImage in /boot/ of ext3 partition and also to FAT32 partition.

The following are the steps I have followed:

U-Boot> usb start
(Re)start USB...
USB: scanning bus for devices... 2 USB Device(s) found
scanning bus for storage devices... 1 Storage Device(s) found
U-Boot>

I tried to scan the partitions:

U-Boot> usb part
print_part of 0

Partition Map for USB device 0 -- Partition Type: DOS

Partition Start Sector Num Sectors Type
1 129 1023999 83
2 1024128 2882880 b

print_part of 1
## Unknown partition table

print_part of 2
## Unknown partition table

print_part of 3
## Unknown partition table

print_part of 4
## Unknown partition table
U-Boot>

In the above, I could not find the ext3 partition. Do the u-boot will not recognize ext3?

I am interested to boot the board with 'usbboot' command.
The format of usbboot command is as follows:

usbboot loadAddr dev:part

Can anybody tell me how to pass parameters to dev & part to 'usbboot' command?

Where I have to place my uImage? In ext3 (or) FAT32 partitions?

Thanks & regards,
Jagan