My installation of a new drive in the EX4 failed. I suspected the drive and have since received a replacement from WD but I haven’t tried to install it suspecting that it’s not the drive but EX4 software. I’m running OS X 10.11.8 El Capitan and the EX4 is current with 2.11.157.
I sent an inquiry about this to WD Support and the response was that the installation process should work even if the new drive was a different capacity.
I have three JBOD 1TB drives and a vacant slot. I shut down the EX4, installed a new 3TB WD NAS drive in the fourth slot, powered up, waited for the fourth LED to become red and opened Dashboard.
In Storage/Disk Status the fourth drive was shown as Good. Selected Storage/RAID/Change RAID Mode/Select JBOD/check Create New Volume(s)/Next/ The Change RAID Mode box is displayed and Drive4 3TB is displayed and a “Drice Self Test” runs with a “Good” outcome.
An encryption option displays and selecting Next (without encryption) displays a summary of the selected configuration and selecting Next displays a pre-format notice and selecting Finish displays a Partitioning notice and a Formatting progress bar.
The Formatting progress bar remains 0 and in about 12 minutes a format failure message is shown, “Error Code 635.”
About a year ago I swapped out the first three drives and had no trouble at all. Am I missing a step or making an error this time? Any suggestions? Thanks