On Sun, 19 Jul 2009, Frank Middleton wrote:
Yes, mirroring is a must, although it doesn't help much if you
have memory errors (see several other threads on this topic):
http://en.wikipedia.org/wiki/Dynamic_random_access_memory#Errors_and_error_correction
"Tests[ecc]give widely varying error rates, but about 10^-12
error/bit·h is typical, roughly one bit error, per month, per
gigabyte of memory."
That's roughly 1 per week in 4GB. If 1 error in 50 results in a ZFS
hit, that's one/year per user on average. Some get more, some get
less.That sounds like pretty bad odds...
I fail to see anything zfs-specific in the above. It does not have
anything more to do with zfs than it does with any other software
running on the system.
I do have a couple of Windows PCs here without ECC, but they were
gifts from other people, and not hardware that I purchased, and not
used for any critical application.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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