Mirror existing NAS to new NAS?

It does take a while to get into the position of using a second NAS as a backup to the first. While the first backup with NFS will take some time, when you change over to rsync, you will be amazed at the speed of the backup. Of course the first backup will be from your current NAS to the new, you may have to do a second one back. If you currently have all 6 bays occupied, in order to move to dual redundancy, you will have to perform a factory default. If you have at least one empty bay, then you can do the change on line.

When you set up the initial backup, your source is a share and the target is NFS Server, and the path is the same share. The shares on the backup target should be set up to mirror the shares on the source. Once you have made the initial backup, shift the target to Rsync Server, verify the path is still the same and run the rsync backup. This will verify the backup is good. Rsync synchronizes each file on a sector by sector basis between the two units. Once the initial backup has been made, and verified by a rsync, each additional backup can be measured in minutes and seconds, not hours.

I have four shares set up, and the largest contains my video. Even after adding tens of gigabytes of video files, the rsync update of the backup only takes a handful of minutes. My backups start running at midnight, and it is a great comfort knowing that if I have a problem, I have a backup that is never more than 24 hours old.