On 11/18/2011 11:46 AM, andy pugh wrote: > On 18 November 2011 16:31, gene heskett<[email protected]> wrote: > > >> An interesting question, and not that I know of. The problem is likely one >> of overflow in the emc internal counter, >> > The accumulator is 64 bits. At 3000rpm and 16x microstepping I make > that 3 million years before counter roll-over. > > I am unconcerned, that's not my bug to fix :-) > > It is interesting how things like this, when translated into minutes, hours and then years oftentimes quickly exceeds our lifespan.
I ran into the same thing last year on a one way - indexed chain drive on a machine. You might remember that. I first thought I had to deal with a 32 bit counter that would roll over every hour or so.. then I was told it is a 64 bit counter and the time required to roll over immediately exceeded the 1 year warranty period on the machine, buy a few hundred years! :-) The machine has been running 16 hours per day since June of 2010, and so far no rollover issues. :-) They have had to change the index drive gearboxes on the machine twice since then.... but that cost is incidental as they push the heck out of the machine to increase throughput and make more $. They are doing 24-26 indexes per minute.. which is about twice the original machine design rate. They love that machine. Dave ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
