How to extract root file system in MMC?

Rachit Shah said:

I have checked default omap demo loaded on flash. LCD Touch screen test isn't giving any display on LCD or console. How can we check that it has completed touch screen test?

The touch screen test simply means that when you touch the screen it flips through the pictures that it would have displayed normally, it does not output anything on the console. Note that the way it is configured out of the box the screen will go out if nothing is done on the terminal for a few seconds (it goes into a low power state) so if your LCD is currently blacked out you may be able to get it to come back by touching a key on your serial terminal. When the touch screen test completes it just goes to a blank screen, at that point just press another button to run some other test or display an image (like S9).

Rachit Shah said:

I have copied pre- built images MLO, u-boot.bin and uImage in FAT partition of SD card from OMAP35x-PSP-SDK-02.01.03.11. Now, I want to extract either rootfs.jffs2 or ramdisk.gz.

Which partition of SD card i need to use to extract this fs?  How to do that?

In general on a SD card you would not use the jffs2 filesystem image, this is what you would normally use in a on board flash situation, the ramdisk is possible but I would normally recommend a separate partition on the SD card. With the SD card you can partition it into a boot partition (FAT) and a filesystem partition (EXT3) so that your filesystem exists cleanly on the SD card, once the partition is in place you could simply extract the nfs.tar.gz file into it. There are several articles (and even threads on this forum) out there on setting up SD cards for booting on OMAP3, you may start with http://code.google.com/p/beagleboard/wiki/LinuxBootDiskFormat for getting your initial format done if you have not already, and then extract your nfs.tar.gz file into the second partition.

Rachit Shah said:

Here Processor board sticker is O3530-PB-S33-M2I-0430 So as per that it's Micron NAND..right?

I am not too familiar with the serial numbers being used these days, but I can say that unless you have a very old board you bought from some odd source (like eBay) you probably have a Micron board, only the early boards back during the beta period had Samsung NAND.