One of our machines is running Windows XP x64 with all updates. It's disk configuration is 2x931 Gb RAID 1 with two partitions C: 50 Gb and D: 881 Gb. D: is an actively-used partition with about 20% free space. I ran Deffragler 1.09.138 for partition D: on Friday evening. After running about 1 day (as I can conclude from Event Viewer) machine stopped responding (though replied to ping) and started only after reboot on Monday. After reboting Intel Matrix Storage Console reports that it's checking RAID volume and fixing errors (have found 8 errors by now).
I've seen such scenario for this machine several times. I've never seen such errors without running Defraggler immediately before they apper. I'm sure these RAID errors are because of Defraggler. It would be great if these errors would be fixed.