The last step in configuring your new storage system is replication and synchronization. Copying gigabytes of data between the two NAS systems wasn't something we wanted to do, particularly since some of the data files change daily. We had hoped to use Computer Associates' BrightStor storage management software (which we had in the lab) to accomplish the replication and synchronization process. But we realized we owned only a trial license for BrightStor. So under a tight time line of just over a week, we went looking for a new replication and synchronization solution.
We first considered Snap's replication software for the Snap 18000, which the company was showcasing at Storage Networking World. The tool was a fit, but Snap couldn't deliver it within our time frame, so we went with XOsoft's WANSyncHA, which handles replication and synchronization in a pretty straightforward manner. The WANSynchHA interface took about two minutes to set up replication of all volumes from the NSS to the Snap Server.
Be sure you have a tool available for copying data over to your new storage system, and keep it up to date throughout testing. It's easier than setting up bulk copies that must be run regularly.
Some days it seems you're just not meant to touch a critical project. It was one of those days when we installed WANSyncHA: The software began returning permission errors on the Snap 18000 drive as soon as we got it running.
The user interface was running as the logged-in user, so we created folders on the drive through Windows Explorer (we had tested this when we configured the Snap initially, but better safe than sorry). Next, we looked up the error message in the documentation. Although XOsoft documents about 20 error messages that WANSynch returns, ours wasn't among them.
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