We're trying to replace Windows DFS-R with SnapMirror for a remote site fail over. I'm testing on a FAS2040 with dual controllers. I have a Qtree containing a Windows LUN on the first controller and I've configured an asyncronous mirror to a volume on the other controller. Once I put each controllers IP in /etc/hosts SnapMirroring seems to work as expected. I mapped the source LUN on one windows server via Fiber Channel and mapped the destination LUN on a different server. The destination correctly shows as a read-only disk to the Windows Storage Manager, but I can't apparently configure mount points in the GUI on a read-only device, so I used Diskpart to mount the destination. What I expected to see what a read-only FS that updated whenever a SnapMirror cycle was completed. Instead, I see a read-only view of the data from the point in time when I assigned the drive letter. If I remove and re-assign the drive letter, then the changes show up.
I don't have SnapDrive licensed yet, so I don't know if this works differently using SnapDrive. Is there a way to always see the latest version? I'd like to use DFS to redirect my remote users to this read-only copy if the WAN connection is disrupted.