On Wed, Mar 09, 2011 at 09:01:33PM +0800, Shawn Guo wrote: > On Tue, Mar 08, 2011 at 04:59:18PM +0100, Loïc Minier wrote: > > On Tue, Mar 08, 2011, Shawn Guo wrote: > > > I'm scanning all 7 cards I have with the script wait_device, each card > > > with 10 iterations of the test. > > > > > > 1) Transend 4GB SD > > > 2) SanDisk 2GB SD > > > 3) KingMax MMC Mobile 2GB > > > > > > All above 3 cards passed the test with giving "Could list partitions > > > after 0 seconds!" > > > > > > 4) SanDisk 4GB SD > > > 5) SanDisk 4GB SD > > > 6) SanDisk 4GB SD > > > 7) SanDisk 4GB SD > > > > > > All above 4 cards failed with giving "Giving up after 30 seconds > > > failing to list partitions". The interesting thing is it does not > > > always fail from the beginning. Some cards can even pass the test for > > > 4~5 iterations, and then start failing. If it starts failing, it > > > always fails until I remove the card and replug it. > > > > This is really valuable data; SanDisk 4 GB SDs seem to be a trend > > above! It would be interesting if you could borrow another USB reader > > for some hours to run the tests on the same SD cards, but a different > > adapter. > > > Today in office, with another reader and another maverick machine, the > result seems consistent. The new thing is those four failing cards > sometime ends up with "Could list partitions after 2 seconds!", besides > the two possible results reported before, 0 second and failed to list. > I just tried another SanDisk 4GB SD card (#8) borrowed from colleague. With 20 iterations testing, it reports:
Could list partitions after 0 seconds! --> 13 times Could list partitions after 2 seconds! --> 5 times Could list partitions after 4 seconds! --> once Could list partitions after 8 seconds! --> once But it never ends up "Giving up after 30 seconds failing to list partitions". -- Regards, Shawn _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
