Error in z8 upgrade


#1

When trying to start it up:

Error: Incorrect or no genesis block found. Wrong datadir for network?

Is there a file I need to delete?


#2

The blockchain has been reset in the z8 release. You will need to delete the ~/.zcash/testnet3 directory (the rest of the ~/.zcash directory should be left as-is).


#3

Awww... All my 200+ test zec go byebye...


#5

Unless it's a pretty fast machine, it now needs 8 GB instead of 4 GB. It appears the reason is that Unbuntu requires 2 GB and 4 threads of Zcash now requires about 2.2 GB.

Why are the coin rewards multiples of 0.063? (but not quite whole multiples)

Are 8 GB systems the target audience for mining?


#6

The Equihash parameters were changed (to n=200, k=9), and they indeed require slightly more memory. If this is a problem, use fewer threads.

[Edit: hmm, that link doesn't work because of the space in the URL. Click "memory equihash" on the left-hand panel to make it load correctly.]


#7

The blockchain was reset, so you are seeing the mining slow start again. The coin rewards that miners get will slowly increase over the next month up to 10 ZEC.


#8

@zawy Just to add, you can use the getblocksubsidy command to see what the reward is for a particular block e.g. zcash-cli getblocksubsidy 50


#9

@bitcartel Thanks. At first I thought "yeah, that's interesting", but then I realized I really needed to know it in order to avoid fumbling around with math in bash.


#10

Where can I download Z8 ?


#11

Look at the latest blog post. They did it this past weekend.


#12

I'm currently doing a fresh install and somehow the fetch-params.sh has downloaded the z7 keys... Is this something to do with the previous releases not resetting the blockchain?


#13

I've had my newly compiled zcashd online for a little while now but no blocks are downloading.


#14

I believe my installs were downloading the z7 keys also.

I have one machine saying block number 1352 while the others say 1356. Connection to leastauthority is established. That's a bug. An error message needed to show, but I guess it's probably a known issue in the bitcoin code.


#15

My complied Zcash does not sync. When I try to mine, it mine on its own fork.


#16

Starting and stopping zcashd on that machine brought it back to the right chain.


#17

I'm a different version of linux and everything looks fine, but it will not connect to leastauthority to start getting the blockchain. It's listening on the other 3 lines as usual. Suggestions?


#18

I even deleted zcash, .zcash, .zcash-params folders then compiled from scratch but no success.


#19

Make sure your browser can see the internet, then use the following after starting zcashd
lsof -i | grep zcashd
to see if connection to leastauthority is "establised".
I assume you have gen=1 and genproclimit=4 (or 1,2,3) in zcash.conf
If your browser works and there's no connection to least authority then you're in the same boat with one of my PCs.


#20

@hud
Has Zcash ever run successfully on your machine?
What version if Linux are you using?
At what step does it fail, and what error codes do you see?


#21

I've been successfully running Zcash since z2 on my laptop, not sure why this time it fails.