Dear vk,

In message loom.20120131T094437-306@post.gmane.org you wrote:

Is it safer to test flash during bootup...what if power gets off half a way while writing data on address at which uboot source code is located?Then uboot will never get started??

Write testing of flash devices on a regular base (like as part of the POST at every power-on or even at every boot cycle has never been a clever idea. It is risky. And I doubt if people who design such a test understant the failure mechanisms of such devices, and what can be done to prevent problems.

In most cases I've seen so far the tests did not do anything good. They only reduced the life time of the devices. A really stupid thing to do.

Best regards,

Wolfgang Denk