Topic: ANTMINER S2 Discussion and Support Thread - page 4. (Read 355888 times)

SWEET!!! Actually have had my S2 hashing overnight and whenever we do finally get this upgrade or upgrade kit rather I'll be getting one. I'm sure most with S2's will be getting the upgrade?

After having no setup issues and running great for the last couple of weeks, I woke up this morning to find my batch 1 AntMiner S2 not hashing, fans going full speed, panel dim and the red light solid. Recalling that others here have had the same issue, I went back and skimmed over the previous posts and found that the likely issue was probably a corrupt SD card. That was indeed the case, as I am now back up and running, and I figure the problem started when a brief power outage occurred here this morning. Thought I would briefly summarize what I did to recover, which may be of special interest to those folks using a Mac to write to their SD cards:

- ran to the store and bought a 4gb Sandisk microSD card. They didn't have any class 10 cards, only class 4, but it seems to work (ordered a couple class 10s from Amazon for backup).
- Downloaded onto my MacBook the latest firmware from the bitmaintech website, as well as the SD card image from https://dl.dropboxusercontent.com/u/16075357/bitmain.img.zip (thanks 1l1l11ll1l)
- put the new microSD card in the adapter, shoved it into my MacBook, read through the guide at http://elinux.org/RPi_Easy_SD_Card_Setup, and then ran these commands in Terminal:
   cd Desktop (my bitmain.img was on the desktop)
   diskutil list (to find the disk name of SD card, mine was disk2, so replace disk2 below with what yours is)
   diskutil unmountDisk /dev/disk2
   sudo dd bs=1m if=bitmain.img of=/dev/disk2 (this took 30 minutes to complete)
- once SD card was ready, I opened up the AntMiner, pulled out the BeagleBone card, swapped SD cards and reassembled
- powered up, and it started hashing again. Connected to the miner from the browser, uploaded the latest firmware, changed to point to my pool, and everything was golden.

Much thanks to all of previous posters that talked about this issue, as your help got me back up in hours as opposed to days.

At .4w/gh does this mean an upgrade to 2.5th/s?

At .4w/gh does this mean an upgrade to 2.5th/s?

I tried two additional SD Cards, and I'm getting the same symptoms, so I believe it is the BBB controller.

I found these instructions to get the BBB rev C working as an S2 controller. They look a pretty tricky, it's certainly not just a case of plugging in my working SD Card. The other downside is that the BBB rev B or C won't automatically boot to the SD Card, you have to manually push the Boot switch. This really isn't an option for me, as power outages do happen and I need it to automatically recover.

Is it possible to order the original cutdown BBB from Bitmain? Then I can just plug in my SD Card and it will work.

Very helpful, thanks dogie (and nice to get official confirmation that the controller is a standard BBB). I'll start troubleshooting with another SD card as suggested.

It's at a remote location (i.e. not at home) so it might take me a while to get access, but I'll report back.

How could you spend this coupon for buying S2?!!.. It was intended only for purchasing S4...  

Any data on replacement fans around?  I know the size but was wondering if there is a preferred aftermarket model?

Order Details

AntMiner S2 1TH/s Miner Batch 4 × 1  1850 USD ( 3.135 BTC )
AntMiner S2 Coupon 400 USD x 1   -400 USD ( -0.678 BTC )
Shipping  UPS 0  BTC
Order Total: 2.457 BTC

Send Details Date 2014-06-26

I won an auction for an S2 for only 0.30BTC plus shipping. Im super excited.

Free Electricity FTW!

I can't believe these cost 8BTC 9 months ago, just wondering did anybody actually ROI ? It looks impossible even if you had free electricity because the most BTC you could of earned was only 8 BTC in total.