On Thu, Feb 26, 2009 at 03:19:56AM -0800, john_re wrote: > Do you use ECC RAM? Do you have any data about failure rates? > > I'm evaluating this for a system with 8GB DRAM, & > http://en.wikipedia.org/wiki/Dynamic_random_access_memory#Errors_and_error_correction > says > "Tests[ecc]give widely varying error rates, but about 10-12upset/bit-hr > is typical, roughly one bit error, per month, per gigabyte of memory. > > In most computers used for serious scientific or financial computing and > as servers, ECC is the rule rather than the exception, as can be seen by > examining manufacturers' specifications." > > > So, for that data 8GB DRAM is about 8 errors per month, ie about > one per 3-4 days. > > What rates do you have?
I don't know. Does a box with ECC tell you? A non-ECC box that has an error may just show up as a random non-reproducable error of a range of severity. A piece of software may crash, a comma turn into a period in a letter you're writing, who knows. I think its the "who knows" factor that makes ECC worth it in some applications. Doug. -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
