Hey all, Just an update on my situation, and im seeking some information. Bitmain is replacing my bad blade, and are even covering the shipping cost. Ive come to really appreciate this machine,Its not quite as nice as a terraminer in terms of "bells and whistles", but it runs cooler and quieter, is cheaper and seems easy to tinker with, (not to mention Bitmain doesn't care if you open your machine and tech it, where as Cointerra has a warranty seal). Anyway so here is my question, I used my coupon $400 off to buy another S2 today,, and have decided that id like 10 more, but want to pay the coupon price for all ten. I emailed Bitmain and they said : "Hi only $400 coupon for each unit can be offered.Please place order in our website directly.Thanks." So it kinda didn't really answer my question, I logged into my account and noticed that the coupon I used earlier today is still there, it still has a donate button, and it shows 1 total count, but then has a column next to it that says "Use Count 1" So i guess my question is am i able to use the same coupon more than once?

That looks like a permissions problem. Check that the image file/folder isn't set to read only - if it is, uncheck it & re-burn the image again.

Did anybody successfully tried to move boards around when you have one that periodically throws a bunch of (x)s, like 00X00XX000000?
I my case (x)s could be fixed by a reboot every ~24hr which is not a biggie, yet I would like to avoid the reboot.

I noticed that at least in my machine boards differ somewhat with some having more massive sinks than others. A couple have a bent/dent that goes around chipset on the bottom-or is it accidental?

One curios piece of info that might be of some use: my machine seems to be sensitive to how far away the outtake fans are from the wall.
A bit more than half a feet (or 15-20cm) from the wall-not good, thermal shutdowns every 12 hours or so, 1.5 ft (~half a meter)-no thermal shutdowns so far.

Makes sense, you're significantly reducing the airflow by being close to a wall for a design like this.

Perhaps someone can help.  I ordered a S2 and it just arrived today, I am in the U.S., but the power plug that came with the unit seems to be different than a standard U.S. plug.  It has 3 prongs, but they are all flat, has anyone else encountered this and can I just go and buy a proper cord from a store to replace it?

So BM sent me a new card to replace the card that was half x's, but I'm still seeing my S2 hashrate slowly drop over the course of 12-24 hours.  Reboots and config changes show random, scattered x's across various boards, although they always show all o's after I reset the PSU.

Do I need to break down and upgrade the PSU to a 1200-1300 Watt output?  I'm open to all suggestions!

You're not testing with one board alone are you? That slot throws up errors if all the ones above aren't populated. Its also the most sensitive to low power or power issues.

I'd advise against it. Even though the PCI-Es likely share the same power plane, there is a significant risk of cross loading or one being loaded more than the other. Stock PSU is fine until it dies, mine is still going after months and months.

After I reimaged theflash drive with bitmain.img, I got a nasty message after trying to ssh into S2



How this could be remedied apart from hopefully going back to the old SD card? Is this normal when reflashing the SD card with bitmain.img?
How one finds out a correct host (mine) key?
Thanks. Right now I cannot ssh into the machine because of this.

its easy to fix
just remove the known_hosts file (I do this all the time on my mac)

bring up terminal

cd .ssh
rm known*

(and try ssh connection again)