Much Ado About ReadyNAS Ultra 4

That's a bummer, but better now than later when you have a lot of data on them. A dual failure like that with data can and will cause data loss.

Suggestion - unless you have already committed the NV+ to another use, I would set it up as a backup to the Ultra 4. The best way to transfer the files over is to use the backup routine in Frontview. You can either use the Ultra to pull the files from the NV+ or the NV+ to push the files to the Ultra 4. The first backup should be by NFS and when it completes, change the method to rsync and run it again. The first copy will take hours and hours depending on the volume of files you have. The rsync job will only take minutes as it will synchronize the files between the two machine. Then you can reverse the sequence and use rsync to synchronize the Ultra to the NV+. Since you will already have the files on the NV+ it shouldn't take long to run (minutes). While the Ultra 4 has the power to run several backup jobs at once, the NV+ does not.

I have my NAS to NAS backups start at midnight. I have 5 backup jobs since I have 5 shares to backup. The nice thing is if you need to work on the Ultra 4 for some reason (upgrading disks) you can still access the files on your NV+. I also use static IP's so I can tell which unit is which unit (NAS1 uses an IP ending in 201 and NAS2 uses an IP ending in 202).