According to the hard disk drive guide at http://www.storagereview.com/guide2000/ref/hdd/index.html, a wopping 36% of data loss is due to human error. 49% of data loss was due to hardware or system malfunction. With proper pool design, zfs addresses most of the 49% of data loss due to hardware malfunction.
You can do as much MTTDL analysis as you want based on drive reliability and read failure rates, but it still only addresses that 49% of data loss. Zfs makes human error really easy. For example $ zpool destroy mypool $ zfs destroy mypool/mydata The commands are almost instantaneous and are much faster than the classic: $ rm -rf /mydata or % newfs /dev/rdsk/c0t0d0s6 < /dev/null Most problems we hear about on this list are due to one of these issues: * Human error * Beta level OS software * System memory error (particularly non-ECC memory) * Wrong pool design Zfs is a tool which can lead to exceptional reliability. Some forms of human error can be limited by facilities such as snapshots. System administrator human error is still a major factor. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], 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
