ADVISE PLEASE - Stale and Duplicate shares ??

[bilabonic]

Hi All

I mine on GHash.IO and have several Dragon Miners that ALWAYS shown -

Stale shares - varies
Low - always zero
Duplicate  - always zero

Difficulty is set to 256k on the miner settings and at the pool.

I have just added a an Antminer s2 with the same pool details, it has no option on the miner settings to adjust the difficulty but the pool is the standard 256.

BUT it is the ONLY miner displaying duplicate shares eg 1024 or much higher ?

What does this mean ? Do i need to adjust anything ??

Thanks

[bilabonic]

Plus it has MUCH higher rate of stale shares compared to all my other 1Th Dragon miners ?

[vm1990]

it dosnt really mean anything stale shares means the miners not responded or solved the problem quickly enough. its pretty common when you have high hash speed miners and introduce a slower miner as the pool send problems that take to long for the slow miner to solve.. most pools now auto balance the difficulty of each miner or let the user set it, in an ideal world youd set the difficulty lower the slower the miner. you can see if ghash.io compensates for the slower miner automaticly or see if you can change the difficulty for that miner on you profile