Topic: Avalon ASIC users thread - page 179. (Read 438724 times)

Dude,

I was worried about cooling also. My avalon clocked at 300 making 71 GH steady was ok at about 30C ambient for three days in a row.
However that was for three days only. I have air conditioner now and ambient is at 23C. I do really think that at 35C it will be OK as ngzhang stated but i am not going to try it anyway

Done a little bit study about the cooling, after adding two nexus real silent fan at exhaust, this is the profile I get from a script which recorded the temp each half an hour for several days



After ambient temperature reached 20C, both fan3 and temp3 start to accelerate upwards, means cooling effect start to drop. I have not tested the temp1 at higher than 26C, but I suppose that after the fan reaches 3000+ RPM and temp3 being higher than 47C, the noise and the module temp will become unacceptable

I'm considering two options: Use an air conditioner to keep the intake below 20C, or underclock the avalon when temp3 is higher than 45 degree

Another option is to take all the modules out and mount the cooling fan directly on the heatsink, like someone's cooling on BlockErupter blades, I believe this will dramatically reduce the temp3 by at least 5 degree, but then the other side of the module also need to be actively cooled, it will need at least 3 fans for each module and 9 fans for all 3 modules...  

The existing fans in avalon are industry grade server fans, works quite well, but the datacable and powercable all blocked part of the air that flow through the heatsink

 

Well that worked..almost. I could enter failsafe-mode. Here's the instruction:
--
To get into failsafe mode, power up the device and wait until the LED starts flashing (about 2Hz). Once it starts flashing (within about 4 seconds) then quickly press the button. The LED will then flash much faster and the device will be in failsafe mode.
--

Failsafe IP is 192.168.1.1. I could telnet to the router. I checked

root@(none):/# cat /etc/config/network

config 'interface' 'loopback'
        option 'ifname' 'lo'
        option 'proto' 'static'
        option 'ipaddr' '127.0.0.1'
        option 'netmask' '255.0.0.0'

config 'interface' 'lan'
        option 'ifname' 'eth0'
        option 'type' 'bridge'
        option 'proto' 'static'
        option 'netmask' '255.255.255.0'
        option 'ipaddr' '192.168.0.100'
        option 'gateway' '192.168.0.1'
        option 'dns' '8.8.8.8'

Everything seems fine. Anyway, after rebooting I'm not able to ping or ssh 192.168.0.100.

Edit: Fixed it!
After making the filesystem writeable with "mount_root" /etc/config/network looked differently:

config interface 'lan'
        option ifname 'eth0'
        option type 'bridge'
        option proto 'static'
        option ipaddr '192.168.0.100'
        option dns '8.8.8.8'
        option gateway '192.168.0.101'
        option netmask '0.0.0.0'

Changed it. Reboot. Problem solved.
(And back to my original problem. Will probably talk about that later..)

Thanks for your great and fast help!

A fridge, a washing machine, a dishwasher, hairdryer, air conditioning - all such devices being plugged in the same house wire with the Avalon could easily make it feel dizzy, as well. So better take it into account and/or think about the stock PSU upgrade.

I noticed I didn't have any zombie mode since I changed my TV to another group, I also noticed in retrospect, that the zombie mode happened after I turned on an electrical device that was attached to the same group,  have been running smooth now for 16 days (10 days of cgminer uptime, 16 days of device uptime) .. but i'm not sure if that is because I changed the TV, but who knows..

I dont have avalon, but have 703n, dont try anything without being certain of what you are doing.
Once I tried to reset one 703n with xiangfu custom openwrt(pre-asic) I think I bricked it, hopefully, I had  backup 703 and I still havent tried to repair. Now might be a good time for that, but, Im sure someone else will answer the question before me.

When you reset, somehow, it should go back to default, which is, accordinly to the avalon user guide: 192.168.0.101

Thanks for that quick answer! I have to install cgminer first on my Laptop...
Can the router be reset by the small button? How? What IP does it have afterwards? Will I be able to flash it again with the latest custom firmware?

Really appreciate your help.

you cant reach the router.
the avalon is still there, conect it to your PC with cgminer installed via USB, asap, then you think about repairing/reseting the router.

While trying to solve some networking problems on my avalon I made it even worse

Connected via LAN disabled WLAN, later I set the LAN subnet to 0.0.0.0. IP address is still 192.168.0.100. Now I can't reach it anymore. Is there a way to reach it again?

we are talking about the AVM FRITZ!DECT 200?

--> yes,you need a fritz box for this one

for sure?
(then I have to cancel my order...)

Do you see difference in sentence "Confirmed working PSU list" and for example "Confirmed suitable PSU list"?

on the wiki it says:


but on the confirmed working list there is a OCX ZX


and I find on internet the dimensions of the OCZ are bigger than 170mm:




Wouldn't that make the OCZ too big?
(the Enermax is 16 cm)

yes

Does this one also require Fritz box to be funtional?

http://downloads.qi-hardware.com/people/xiangfu/avalon/latest/openwrt-ar71xx-generic-tl-wr703n-v1-squashfs-factory.bin

With LPC, if you connect more than 15A load, you'll trip your input circuit.

I went for

http://www.digital-loggers.com/din.html

allows you to control eight 15-20 amp circuits. Just need to build enclosure and all the in and out 15A receptacles.
Already got a cheap 12V AC transformer to power it.

PS. Their DIN relay is really eight T90 relays, so 20 amps on each should be no problem.

cgminer 3.1 is the best so far for GPU/FPGA (lower stales, better efficiency).
i went to avalon wiki to download the latest formware but i see too many files.
http://downloads.qi-hardware.com/people/xiangfu/avalon/20130419/
which one to download?

The cgminer 3.0.x versions were the first official release I made that had avalon support in it, but the code is identical to the 2.11.4 version of cgminer I coded specifically for the avalon that xiangfu included in the latest firmware. So no, there is no point upgrading as there is no new code affecting the avalon in cgminer yet.

btw Xiangfu and the rest of the team (I believe Aseras deserves some thanks as well!) I must congratulate you on a job well done with the latest firmware. It is rock solid! I've had 6 days of uptime so far - something I was not able to achieve with previous firmware revisions.

Any plans to upgrade to cgminer 3.0.1? Is it worthwhile?