On Fri, 8 Oct 2010, Michael DeMan wrote:
Now, the above does not include things like proper statistics that the chances of that 2nd and 3rd disk failing (even correlations) may be higher than our 'flat-line' %/hr. based on 1-year MTBF, or stuff like if all the disks were purchased in the same lots and at the same time, so their chances of failing around the same time is higher, etc.
It also does not include the "human factor" which is still the most significant contributor to data loss. This is the most difficult factor to diminish. If the humans have difficulty understanding the system or the hardware, then they are more likely to do something wrong which damages the data.
It also does not account for an OS kernel which caches quite a lot of data in memory (relying on ECC for reliability), and which may have bugs.
Bob -- Bob Friesenhahn bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
