Hi all There have been some recent yaffs changes that fix various things and add some improvements. Most of these are in yaffs_guts.c and can be seen here: http://www.aleph1.co.uk/cgi-bin/viewcvs.cgi/yaffs2/yaffs_guts.c?view=log While I've done reasonably extensive testing, I appreciate it when others find other interesting tests and any feedback is more than welcome. At this stage there is one issue that has been lurking for ages that I am still investigating: yaffs fails fsx. With some tweaks I have been able to get fsx to run for over an hour on simulated nand which is approximately equivalent to approx 5 - 10 hours on real flash. It is interesting though that many tests such as tests in the Android test suite, which use similar calls, runs for over a week without crashing. In the past I have had some stress tests only fail after over 100,000 test cycles and my new benchmark is to run the main stress tests for 1 million cycles every week end. Testing is getting more and more focus with at least one day a week being devoted to improving tests. At the moment I have a dual core laptop that spends over 50% of the time running two parallel tests to keep both cores maxed out. Over the next few weeks I intend to set up a quad core box that will just run these tests on a continuous basis. -- CHarles