Upgrading from unRAID version 3

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Starting with release 4.0-beta1, unRAID Server OS uses a port-based method for assigning hard drives to parity and data disks. This is a consequence of moving to the linux 2.6.x kernel, but is also a much more flexible method.

Follow this procedure:

  1. Referring to the System Management Utility 'Main' page, make a note of each disk's model/serial number; you will need this information later.
  2. Shut down your server, remove the Flash and plug it into your PC.
  3. Drag the 'config' directory of your Flash onto the PC desktop.
  4. Reformat the Flash and install the latest unRAID Server software. You can download it from here. Make sure the Flash volume label is set to UNRAID.
  5. Now open the saved 'config' folder on your PC and copy the following files to the 'config' directory of the Flash:
    your registration key file (something like pro.key or similar)
  6. Right-click your Flash device listed under My Computer and select Eject. Remove the Flash, install in your server and power-up.
  7. After your server has booted, the System Management Utility 'Main' page will probably show no devices; this is OK, navigate to the 'Devices' page. Using the model/serial number information gathered in step 1, assign each of your hard drives to the correct disk slot.
  8. Go back to the 'Main' page and your devices should appear correctly. You may now Start the array.