Nandblasting not working in one xo

[Roshan Karki]

On Tue, Jul 3, 2012 at 8:35 AM, James Cameron <quozl at laptop.org> wrote:

> On Fri, Jun 29, 2012 at 02:19:34PM +0545, Roshan Karki wrote:
> > Nandbalsting simply doesn't start in that problematic xo.
>
> Could you please give more detail on this?
>
> Please try the nb command manually:
>
>         ok nb
>
> Is the message "No multicast NAND server" displayed?
>

Yes, I get this message.


>
> > no error and I also can connect and use Internet from sugar. Though
> > all of the xo in sets have same firmware I even tried updating the
> > firmware to latest version to see if it would help.
> >
> > "open-wlan 6 multinand-traffic? . close-wlan" doesn't return
> > ffffffff. I tried changing server, starting them in different
> > channel. What could be the problem here?
>
> This is a good test, only if your sender is operating on channel 6.
> If it is not, the test is not good.
>

Yes the sender is operating on channel 6.


>
> You say it doesn't return ffffffff.  What does this test do instead?
>
> I have tested here.  If the multinand-traffic? command is not
> returning ffffffff then it should return 0 (zero).
>
> If it returns zero, then it is because there was no multicast traffic
> received with a valid multicast address.
>
> Do you see zero, or does it not return to ok prompt at all?
>

It returns to OK prompt. No 0 or any thing.


>
> On Mon, Jul 02, 2012 at 10:36:57AM +0545, Roshan Karki wrote:
> > I tried doing as you've mentioned. My results are no matter which
> > antenna is selected covering the right antenna caused
> > decrease(number increased) in average RSSI. Left antenna didn't
> > react. There's only around -1 difference in average RSSI between
> > antenna 1 and 2. In diversity mode covering any or both antenna
> > didn't cause any change in average RSSI.
> >
> > BTW pressing 'd' allowed me to go back to diversity mode.
>
> On Mon, Jul 02, 2012 at 10:53:54AM +0545, Roshan Karki wrote:
> > I performed the diagnostic in one of the working XO as well. The
> > outcome for single antenna selected mode was exact i.e. covering
> > left antenna didn't change
> >
> > anything while covering right did in both antennas.  While in
> > diversity mode covering any caused average RSSI to decrease (number
> > increase).
>
> Thanks.  I have tested with two XO-1 and see identical trends.
>
> What are your results in average RSSI dB, with antenna uncovered?
>

I also have access point in another room 10m away. I averaged around -75
with antenna uncovered.


>
> Here are my results.  Numbers are average RSSI dB after 10 seconds.
> Access point is in another room 10m away.
>
> Test start, SKU1 -59, SKU39 -56.
>
> SKU1 covered left antenna -69, covered right antenna -68,
> SKU39 covered left antenna -66, covered right antenna -70.
> Conclusion: both antennas are in use.
>
> press 1, SKU1 -62, SKU39 -54
> SKU1 covered left antenna -62, covered right antenna -82,
> SKU39 covered left antenna -54, covered right antenna -71,
> Conclusion: right antenna is in exclusive use.
>
> press d, SKU1 -59, SKU39 -56
> SKU1 covered left antenna -76, covered right antenna -75,
> SKU39 covered left antenna -62, covered right antenna -66,
> Conclusion: both antennas are in use.
>
> press 2, SKU1 -62, SKU39 -56
> SKU1 covered left antenna -64, covered right antenna -77,
> SKU39 covered left antenna -55, covered right antenna -70,
> Conclusion: right antenna is in exclusive use.
>
> press d, SKU1 -61, SKU39 -57
> SKU1 covered left antenna -74, covered right antenna -66,
> SKU39 covered left antenna -63, covered right antenna -69,
> Conclusion: both antennas are in use.
>
> press 0, SKU1 -60, SKU39 -57
> SKU1 covered left antenna -75, covered right antenna -70,
> SKU39 covered left antenna -66, covered right antenna -67,
> Conclusion: both antennas are in use.
>
> press d, SKU1 -61, SKU39 -57
>
> press l, SKU1 -62, SKU39 -55
> SKU1 covered left antenna -62, covered right antenna -77,
> SKU39 covered left antenna -55, covered right antenna -69,
> Conclusion: right antenna is in exclusive use.
>
> press d, SKU1 -60, SKU39 -57
>
> press r, SKU1 -62, SKU39 -54
> SKU1 covered left antenna -62, covered right antenna -82,
> SKU39 covered left antenna -55, covered right antenna -67,
> Conclusion: right antenna is in exclusive use.
>
> press d, SKU1 -59, SKU39 -56
>
> Overall conclusion: XO-1 SKU1 and SKU39 have diversity receive and can
> also be configure for right antenna only.  The test cannot configure
> for left antenna only.


> Therefore this test is not very useful to you, sorry!
>

No worries :) . I think I should once send this XO for maintenance. Any
other checks you want me to do before that?


>
> --
> James Cameron
> http://quozl.linux.org.au/
>
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