I've have 2 C1's and they were difficult to maintain.  Still, they had liquid cooled heatsinks.

I like the idea of liquid cooled submerged electronics.  Last I looked the best cooling was with an expensive chemical.

I wonder if anyone makes a submerged liquid cooling system for any type bitcoin miner.  I'd like to submerge my 1TB antminer and power supplies and export the heat so as to be able to run through hot summers in the south here.  If Bitcoin goes as high as I'd like, I'd even throw a BFL device into a cooler.  Lots of electronics go bad when the place heats.  Capacitors leak and go bad then bang the gear is dead.

So, that effective chemical is prohibitively expensive.  Something less effective but useful if the coolant movement speed were to be increased to a large exchange.  Anything like that on the market?  Thanks.

soy

Okay, I've had the blockchain back for a week or so.  My Win7 machine has started locking up.  My C: drive is 2TB, backup on another drive.  I see I have used up most of C since starting to rebuild the blockchain with many restarts.  Are there duplicate blocks from earlier attempts that I may delete?

Staking like a boss 

So, I went back to unpruned mode, recrunching the whole 9 yards, and was quite far along on Thursday but it was raining.  So, I shut it down rather than chance a power outage.  Then I left it down until Monday, today, because I always back up my systems on Saturday and also that most failures have occurred on Fri, Sat or Sun.  Today I needed to do some shopping and started Bitcoin-QT before I left.  A cell passed through and when I came back in my systems were down.

I fired them up.  Starting Bitcoin-QT, it went through a check and then said Bitcoin Core not responding.  I just let it set.  Lo and behold, a few minutes later it opened and commenced processing blocks where it left off.  I'm happy.

I wonder.  The many times I've restarted from scratch this year, are there old blockchains abandoned and taking up space?

soy

"You need to rebuild the database using -reindex to go back to unpruned mode.  Do you want to rebuild the block database now?"  So, from 1 year some months to go, it's back to 4+ years. ...my mistake, 8 years 10 weeks behind....

Well, turning pruning on didn't cause a restart.  I'll try stopping and starting without pruning now because if what you say is correct, I don't want to lose the blockchain at the end were I to go to no pruning then.  Although I can see that if one has already deleted a large part of the blockchain then yes, that would have to be downloaded with pruning off.

No, it picked up where it left off, 2+ years to go.  So, the probability that the whole blockchain must first be downloaded before pruning starts is high.

I've torrent downloaded the blockchain before and built from that but it didn't seem any faster.

With only a month or two to go when it almost finished the other day, all those blocks, reindexing seems not to use those but downloads new or am I mistaken?

I agree.  And since drive space isn't an issue, 2TB drive, next time it shuts down I'll restart without the -prune.  The prune switch seems to make no difference in network traffic judging by a glance at the debug network traffic.

To be honest I'm skeptical.  So prune=550 will only keep about 2 days of the blockchain on he drive.  At 2 years 4 weeks behind I suspect all this does is chop off work that has been completed while new stuff is added to the other end.  No difference in the time it should take to get a functioning wallet.

Okay, thanks.  I had been having problems with Google Calendar opening by Task Scheduler in the mornings.  Yesterday I unscheduled it.  Should have had an easier time but when I got on this AM there was the BSOD.  Perhaps because I failed to close Google News last night.  Restarted today and thankfully it went back to processing at 2 years 4 weeks behind.

So, it is possible to prune before the chain finishing?  I'll give it a try.  Thanks.

Anyway to set this Bitcoin-QT to nothing in nothing out until at least it's up to its last previous state, around Feb. of this year?  It feels like I'm getting exploited to hell with gigabytes out and unnecessary repeats of 4 years worth of blocks to check.

One thing is for sure.  This Bitcoin-QT is about as far from eco-friendly as it can get.  Wasted energy.  btc=$946 and falling.

So, my Bitcoin-QT started again, I look some hours later and although last I looked it was down to 3 years, it was back to processing blocks on disk 4 years 25 weeks.

I understand pruning is now possible.  Is it possible to prune before the entire blockchain is downloaded?  I'm surprised some developers of this pos haven't been taken behind the stores and stomped.

Well, the blockchain got as far as February 2017 while reindexing, a little over a month to go.  Then, apparently, there was an unexpected termination last night.  I've restarted, again, reindexing the blockchain from 4+ years.  Second or third time this year.

I suspect one not only needs a fully dedicated system but also have that fully dedicated system on an uninterruptible power supply.  If it wasn't a hickup in power then somebody got in a did me dirty interrupting the process without proper shutdown.  I had carefully shut down the process earlier in the week for a Windows update and changed the reboot for updates to no.

I bet this kind of malfunction causes quite a few early users, like those who earned bitcoins with USB single ASCI devices and put them in Bitcoin-QT wallets, then lost their blockchains but figured they could just rebuild at some later date, to later get frustrated and abandon them. 

Who benefits from lost bitcoins?  They add a false stability to a small degree I suppose.  Might be problematic for regulators (the taxman) if considered more than dust.

soy

Thanks.

On a silver lining note, the sub-1k btc price this morning means that if the bankruptcy payout were to happen today there would be more btc, albeit worth a little less, but I expect btc to generally head upwards over time relative to fiat.

Yes.  I lost 11.8+btc.  Therefore the quip about MtGox giving away free-be's.  And yes, I did open an account with Kraken.  I also considered that others may have misread the MtGox trustee statement when it was issued as I did.  Skimming through it, I somehow left with the idea that Kraken was some sort of extra legal action (my meaning additional legal action not extralegal).  Giving it a better read today I saw it was not.  But, it also could be that if others with accepted claims checked the box for btc payout rather than currency, but also didn't join Kraken, the conundrum that btc payment can only be via Kraken could slow things down for all of us that are due recompense.

It's in reference to a bitcoin give-away site dating back to the beginning.

Vulgarity doesn't always win.  What can you surmise from subject and message?

Okay, so rereading the trustee's statement I see that if I want my payout in BTC I must have an account with Kraken.  Don't know how I missed that previously except for my ADD worsening in my decline.

I don't see a mechanism for informing the trustee of my new Kraken account.  Is one to assume something like an email address comparison will be conducted?  I'd think they'd want more than that.

soy

Heck, I paid taxes on those bitcoins and never claimed loss on tax returns.

You had me at each additional block adds a confirmation to those before.  No additional work being done on transactions in that block.  This was the first I encountered that explanation.  Thanks DannyHamilton.