I have just ordered a My Cloud EX2 diskless unit. I already have two WD hard drives (one 3TB + one 2TB). My plan is to use these drives in a RAID 1 configuration. I believe this will limit me to a total capacity of 2TB since that is the size of the smaller disk.
I’m wondering if I may replace the 2TB drive with a 3TB drive at a later date without losing the data on the existing 3TB drive. The steps I plan to follow are:
Currently install the 3TB and 2TB drives using RAID 1 (resulting in 2TB of storage) until I can buy another drive.
Later, purchase another 3TB drive to replace the 2TB drive.
When I have the new drive, ensure Auto Rebuild is enabled, shut down the EX2, replace the 2TB drive with the new 3TB drive.
Power on the EX2. I assume the Auto Rebuild feature will then mirror the data on the first 3TB drive to the new 3TB drive. This should leave me with 3TB of storage in a RAID 1 configuration.
Is the above scenario reasonable, or should I just move the data to another location and start out fresh when I have both 3TB drives?