AntMiner U3 and cgminer

[Piu3344]

Hi All,

I compiled the latest Github version (4.9.1) of the cgminer to start mining on my AntMiner U3.
Now I realized that ... well ... quite a lot of HW errors ar shown.

I use the following config:

Code:

cgminer --widescreen -o stratum+tcp://eu.eclipsemc.com:3333 -u my_worker -p 123456 --suggest-diff 10 --au3-freq 250 --au3-volt 830

... I took these settings from the Antminers user manual.
Well, after 10 min I already had 15 HW errors.

Question 1: Is that something I should be worried about ? What effect do such errors have after all ?
Question 2: What error is this "Hardware Error" ? Some calculation went wrong ? Device failure ?

[1715327719]

1715327719

[1715327719]

1715327719

[1715327719]

1715327719

[Zich]

Hi All,

I compiled the latest Github version (4.9.1) of the cgminer to start mining on my AntMiner U3.
Now I realized that ... well ... quite a lot of HW errors ar shown.

I use the following config:

Code:

cgminer --widescreen -o stratum+tcp://eu.eclipsemc.com:3333 -u my_worker -p 123456 --suggest-diff 10 --au3-freq 250 --au3-volt 830

... I took these settings from the Antminers user manual.
Well, after 10 min I already had 15 HW errors.

Question 1: Is that something I should be worried about ? What effect do such errors have after all ?
Question 2: What error is this "Hardware Error" ? Some calculation went wrong ? Device failure ?

Let the u3 run for at least 12 hour then check all parameter like accepted share, reject, hw. If the reject or hw too high, then try to lower the frequency.

[Piu3344]

Hm... here ist my output after 20h ...

cgminer version 4.9.1 - Started: [2015-02-13 17:07:41]
----------------------------------------------------------------------------------------------------
 (5s):69.68G (1m):63.01G (5m):62.69G (15m):62.80G (avg):62.96Gh/s
 A:1679011  R:537  HW:3893  WU:877.6/m | ST: 1  SS: 0  NB: 206  LW: 3043057  GF: 0  RF: 0
 Connected to eu.eclipsemc.com diff 51 with stratum as user my_worker
 Block: 98bdb06c...  Diff:44.5G  Started: [01:28:50]  Best share: 1.08M
----------------------------------------------------------------------------------------------------
 USB management Pool management Settings Display options Quit
 1: AU3 1       : 250MHz 840mV            | 68.15G / 62.97Gh/s WU: 877.7/m A:928261 R:190 HW:2157
----------------------------------------------------------------------------------------------------

[Piu3344]

Hi

... so I was sitting next to the Antmine when suddenly I heard this sound ... hmmm, hmmm, ewreeee, hmmm ...
a quick check of the /var/log/messages revealed that the USB port was making trouble and constantly trying to disconnect and reconnect.

As mentioned before, I've the device connected to a Banana-Pi wich eventually seem to have more power distribution problems than just the Harddrive.
So now I connected the Miner to my storrage system (AMD E450 running CentOS 7)

(Stats to be posted here in in couple of hours )  

So currently I only discourage you to use the Banan-Pi in combination with the Antminer U3 for stable mining  

EDIT: It's worse ... I now encounter the same USB errors on my other Linux Box ...

Code:

Feb 15 19:06:57 server kernel: usb 4-5: USB disconnect, device number 2
Feb 15 19:07:20 server kernel: usb 4-5: new full-speed USB device number 3 using ohci-pci
Feb 15 19:07:21 server kernel: usb 4-5: New USB device found, idVendor=10c4, idProduct=ea60
Feb 15 19:07:21 server kernel: usb 4-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Feb 15 19:07:21 server kernel: usb 4-5: Product: CP2102 USB to UART Bridge Controller
Feb 15 19:07:21 server kernel: usb 4-5: Manufacturer: Silicon Labs
Feb 15 19:07:21 server kernel: usb 4-5: SerialNumber: 0001
Feb 15 19:07:21 server kernel: cp210x 4-5:1.0: cp210x converter detected
Feb 15 19:07:21 server kernel: usb 4-5: reset full-speed USB device number 3 using ohci-pci
Feb 15 19:07:21 server kernel: usb 4-5: cp210x converter now attached to ttyUSB0
Feb 15 19:08:07 server kernel: cp210x ttyUSB0: cp210x converter now disconnected from ttyUSB0
Feb 15 19:08:07 server kernel: cp210x 4-5:1.0: device disconnected

[Zich]

Hm... here ist my output after 20h ...

cgminer version 4.9.1 - Started: [2015-02-13 17:07:41]
----------------------------------------------------------------------------------------------------
 (5s):69.68G (1m):63.01G (5m):62.69G (15m):62.80G (avg):62.96Gh/s
 A:1679011  R:537  HW:3893  WU:877.6/m | ST: 1  SS: 0  NB: 206  LW: 3043057  GF: 0  RF: 0
 Connected to eu.eclipsemc.com diff 51 with stratum as user my_worker
 Block: 98bdb06c...  Diff:44.5G  Started: [01:28:50]  Best share: 1.08M
----------------------------------------------------------------------------------------------------
 USB management Pool management Settings Display options Quit
 1: AU3 1       : 250MHz 840mV            | 68.15G / 62.97Gh/s WU: 877.7/m A:928261 R:190 HW:2157
----------------------------------------------------------------------------------------------------

2% reject is high but still acceptable. Try to lower the setting.

[Zich]

Hi

... so I was sitting next to the Antmine when suddenly I heard this sound ... hmmm, hmmm, ewreeee, hmmm ...
a quick check of the /var/log/messages revealed that the USB port was making trouble and constantly trying to disconnect and reconnect.

As mentioned before, I've the device connected to a Banana-Pi wich eventually seem to have more power distribution problems than just the Harddrive.
So now I connected the Miner to my storrage system (AMD E450 running CentOS 7)

(Stats to be posted here in in couple of hours )  

So currently I only discourage you to use the Banan-Pi in combination with the Antminer U3 for stable mining  

EDIT: It's worse ... I now encounter the same USB errors on my other Linux Box ...

Code:

Feb 15 19:06:57 server kernel: usb 4-5: USB disconnect, device number 2
Feb 15 19:07:20 server kernel: usb 4-5: new full-speed USB device number 3 using ohci-pci
Feb 15 19:07:21 server kernel: usb 4-5: New USB device found, idVendor=10c4, idProduct=ea60
Feb 15 19:07:21 server kernel: usb 4-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Feb 15 19:07:21 server kernel: usb 4-5: Product: CP2102 USB to UART Bridge Controller
Feb 15 19:07:21 server kernel: usb 4-5: Manufacturer: Silicon Labs
Feb 15 19:07:21 server kernel: usb 4-5: SerialNumber: 0001
Feb 15 19:07:21 server kernel: cp210x 4-5:1.0: cp210x converter detected
Feb 15 19:07:21 server kernel: usb 4-5: reset full-speed USB device number 3 using ohci-pci
Feb 15 19:07:21 server kernel: usb 4-5: cp210x converter now attached to ttyUSB0
Feb 15 19:08:07 server kernel: cp210x ttyUSB0: cp210x converter now disconnected from ttyUSB0
Feb 15 19:08:07 server kernel: cp210x 4-5:1.0: device disconnected

Are you using usb hub? Try to use powered usb hub.

[matt4054]

I also think 2% HW is normal for the U3 clocked at 250.

Try --au3-freq 225 if you want to test for less HW but given the ratio and accounting for the raw hashrate difference I don't think that it would give you better results at pool side.

[Piu3344]

Well, as mentioned befor, I've now atached the Antminer to my Storage box and the stats after 72 hours are:


 cgminer version 4.9.1 - Started: [2015-02-15 19:08:11]
----------------------------------------------------------------------------------------------------
 (5s):58.00G (1m):62.91G (5m):62.19G (15m):62.77G (avg):63.02Gh/s
 A:3921226  R:2128  HW:475  WU:880.4/m | ST: 1  SS: 0  NB: 486  LW: 6970432  GF: 0  RF: 0
 Connected to eu.eclipsemc.com diff 81 with stratum as user my_worker
 Block: 15d768b1...  Diff:44.5G  Started: [21:04:44]  Best share: 56.2M
----------------------------------------------------------------------------------------------------
 USB management Pool management Settings Display options Quit
 1: AU3 1       : 250MHz 830mV            | 60.68G / 63.05Gh/s WU: 880.8/m A:3142825 R:1731 HW:372
----------------------------------------------------------------------------------------------------

I've plugt in the Antminer directly to one of my USB ports ...

[Mikestang]

Hm... here ist my output after 20h ...

cgminer version 4.9.1 - Started: [2015-02-13 17:07:41]
----------------------------------------------------------------------------------------------------
 (5s):69.68G (1m):63.01G (5m):62.69G (15m):62.80G (avg):62.96Gh/s
 A:1679011  R:537  HW:3893  WU:877.6/m | ST: 1  SS: 0  NB: 206  LW: 3043057  GF: 0  RF: 0
 Connected to eu.eclipsemc.com diff 51 with stratum as user my_worker
 Block: 98bdb06c...  Diff:44.5G  Started: [01:28:50]  Best share: 1.08M
----------------------------------------------------------------------------------------------------
 USB management Pool management Settings Display options Quit
 1: AU3 1       : 250MHz 840mV            | 68.15G / 62.97Gh/s WU: 877.7/m A:928261 R:190 HW:2157
----------------------------------------------------------------------------------------------------

You're running that thing near max specs, that's what's causing the errors.  Drop the voltage down to 800 (850 is max, and you're at max freq), which is still considered "high" for these units.