This solution will guide you through the steps that you need to follow in order to upgrade a DDP from V3 to V4.

Every V4 upgrade must be approved by the DDP Headquarters as it involves a hardware change which consists in inserting a pair DOMs (Disk On Module) into the DDP.

The DDP that will receive the upgrade should also be under software warranty contract.

Finally, please note that all the DDP data needs to be backed up to an external storage like another server or LTO tapes.

Although there should not be any data loss during the upgrade process, this precaution is mandatory unless all data can be deleted prior to the upgrade.

Once all the data is backed up, you can plug the pair of DOMs that you received from the DDP headquarters.

To do that, power off completely the DDP as well as the JBODs that are possibly connected to it.

Inserting the DOM modules

Then open the DDP with a screwdriver and locate the motherboard SATA ports.

Plug both DOMs to the SATA ports and make sure to also plug their connectors to the power as per the following picture:

When both DOMs are properly plugged, close the DDP lid and make sure to put back all the screws you previously removed.

For the next step, you will need to plug a monitor and keyboard to the DDP.

Alternatively, you can use the DDP IPMI port that comes with every chassis sold after mid 2014.

Changing the motherboard BIOS settings

You can then boot up the DDP and enter the motherboard BIOS by pressing the DEL key. (might differ depending on your DDP model)

Once in the BIOS, navigate through the options and make sure the SATA mode option is set to AHCI mode as per the following picture.

Then change the hard drive boot priorities and make sure that "P0: SATA SSD" comes in first position as shown below.

The "P1: SATA SSD" should come in second position as it represents the back OS that can be used in case of disaster recovery.

The other entries can be ignored as they do not matter anymore.

Once these changes are applied, save the new configuration and exit the BIOS, which will reboot the DDP.

Configuring the DDP network interfaces

The DDP should now boot from the DDP OS V4 which is on the first DOM.

Make sure you see the "V4" keyword in the hostname that appears when the DDP OS is up.

If you cannot see it, it most likely means that the bios settings are not properly set up.

Also note that the default kernel that is selected in Grub menu is correct, you should not manually change it.

If the default kernel does not load properly, it indicates that the AHCI setting is not properly setup in the BIOS.

When the DDP is up and running on the V4 OS.

You can login as root user (password is "aap") and start configuring the network interfaces.

When booting up the DDP on V4 for the first time, you might need to edit the /etc/udev/rules.d/70-persistent-net.rules file and reorder the network entries as following.

First identify the "(ibg)" network interfaces in the listed entries.

These ibg interfaces are the ones that correspond to the two onboard 1Gbe ports.

The 1st port should be assigned to eth0 and the 2nd one to eth1.

In order to know which one is the 1st or 2nd port, take a look at the MAC addresses as emphazied in the picture above.

Note that both ports start with 0c:c4:7a:73:f8:** in our example. Only the last digits are different.

You need to assign eth0 to the MAC address that has the smaller value and eth1 to the bigger value.

So in our example, 0c:c4:7a:73:f8:b4 should be assigned to eth0 and 0c:c4:7a:73:f8:b4 should be assigned to eth1.

Make sure that the "NAME=" field points to the correct network interface and edit it to reorder them if necessary.

Other network interfaces might possibly be are already assigned to eth0 and eth1, so you need to make sure that they do not overlap with each other.

After modifying the file, save it and reboot the DDP to apply the changes.

The next step consists in configuring the internet access and preparing the service connection.

Preparing service connection

From this point, you should be able to ping the DDP when connecting a 1GbE cable to the first port. The default IP is (subnet

If you cannot ping the DDP first port (eth0), you might want to check its network settings by using the Linux standard commands like ifconfig and editing the /etc/network/interfaces file if necessary.

After editing this file, make sure to restart the network interfaces by executing the "/etc/init.d/networking restart" command.

Also make sure that DDP second port (eth1) is set to DHCP in order to enable internet access.

Below are the correct settings you should have in your /etc/network/interfaces file:

When the internet connection is ready, you can initiate service connection and contact us so that our engineers complete the upgrade and import the V3 volumes to the new V4 filesystem if necessary.