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Dell PowerEdge Guide

How do I install an operating system?

Due to the customized nature of the Dell server, we do not offer to pre-install any operating systems, because we do not know what kind of RAID and hard drive configuration the client wants. This is why Dell servers are delivered with the Rescue System.

Once the server is online, you need to configure the RAID controller. After that, you can install one of the supported operating systems, either automatically via Robot or manually via the installimage. Alternatively, you could also mount your own ISO image and install an operating system using the KVM function.

Which Operating Systems are supported?

  • CentOS 6.4 and later
  • Debian GNU/Linux 7 (not R530)
  • Debian GNU/Linux 8 and later
  • Ubuntu 12.04 LTS and later
  • OpenSuSE 12.3 and later
  • Fedora 19 and later (only via VNC)
  • Windows Server 2012 / 2012 R2

For Debian GNU/Linux, CentOS, and Ubuntu LTS, you can also use OMSA. To use OMSA, just enter the following command for the installation via installimage:

installimage -z OMSA

You can also install OMSA at any time in the future using the package manager of your system. For Windows Server corresponding installation packages are available from the Dell website.

Unsupported Operating Systems

  • Debian GNU/Linux 6.0.7 - Due to a bug in the Intel NIC drivers, the MAC addresses are not properly detected and configured. Using an alternate kernel (eg. from backports) or updating the kernel (to update the driver), should make it possible to run, but this is not guaranteed or supported.
  • Windows Server 2008 R2 - Due to the memory limit of 32 GB RAM of the Standard edition and the Web edition, this operating system is not available.
  • VMware vSphere/ESXi - Installing this operating system is possible starting with 5.1, but it is not supported by Hetzner.

What is the iDRAC?

The iDRAC (integrated Dell Remote Access Controller) is an integrated tool which can perform a multitude of configuration and maintenance tasks. By logging on to the iDRAC, you can fix many problems yourself immediately, instead of having to rely on our support staff.

How do I connect to the iDRAC?

In the order completion mail, there are two IP addresses; one of them for the server itself and the other one for the iDRAC. The login details for the iDARC are noted in the email below the login details for the server itself (they are separate logins).

iDRAC login screen

Just enter the iDRAC IP into the address bar of your browser and confirm any possible security warnings. After that, you will see a web interface and you can log on with the iDRAC login information. At this point, you can use the KVM function, turn the server on and off, mount an ISO image for an installation, and diagnose hardware problems.

How do I change the iDRAC password?

First, log on to the iDRAC and in the menu on the left, select "User Authentication" under "iDRAC Settings". Then, click on the user id of the user whose password you would like to change (for example root, ID 2).

1st step of changing password

On the new page, select "Configure User" and click on "Next".

2nd step of changing password

On the page that you see now, check the box that says "Change Password", enter the password in both text boxes below, and click on "Apply" on the bottom right of the page.

third step of changing password

How do I see the drives?

When you receive your Dell server, it usually does not yet have a RAID configured. This is why you cannot see any logical drives, but only unconfigured drives. So don't worry, your drives are there. However, before you can install an operating system, you need to set up at least one logical drive by configuring the RAID controller.

How do I configure the RAID controller?

There are a wide variety of options available to you for configuring the RAID controller. For instance, you can use the KVM function of the iDRAC to restart the server and press Ctrl-R when you see the message to do so to go to the traditional RAID controller BIOS. Alternatively, you can also get to the RAID settings via UEFI by selecting "Device Settings".

Furthermore, in the Rescue System, you can use the command line tool megacli. Here is a simple example for a first configuration:

  • First, you need to decide on the drive configuration you would like to use. The controller offers a multitude of different RAID levels and depending on the number of drives in your server, different RAID configurations are possible. In all further steps, we will assume you chose a RAID 1 configuration with two drives. Please adjust the examples to your needs. The text boxes in each step contain the commands you need to enter in the Rescue System.
  • Next, you need to acquire some information about your drives:
megacli -PDList -aAll | egrep "Enclosure Device ID:|Slot Number:|Inquiry Data:|Error Count:|state"
  • You will get output similar to this:
Enclosure Device ID: 32
Slot Number: 0
Media Error Count: 0
Other Error Count: 0
Firmware state: Online, Spun Up
Inquiry Data: ZX512545333TSQ50NS RAAA
Enclosure Device ID: 32
Slot Number: 1
Media Error Count: 0
Other Error Count: 0
Firmware state: Online, Spun Up
Inquiry Data: ZX512545001TSQ50NS RAA0
  • Please write down the Enclosure Device ID and the Slot Number of the drives you want to use in this RAID configuration.
  • After that, you can create the RAID array:
megacli -CfgLdAdd -r1 [32:0,32:1] WB RA Direct CachedBadBBU -a0
  • In that command, you can choose the RAID level by changing the number after the option "-r", so for instance "-r1" for RAID 1 or "-r5" for RAID 5. In brackets, you list the drives that you want to use in the RAID array. The entries are separated by commas and always use the pattern Enclosure Device ID:Slot Number. In the above example, the RAID will contain the drives with Enclosure Device ID 32 and Slot Number 1 and 2. Please adjust this command according to the output of megacli on your system.
  • After adding a new LogicalDrive the initialization will start automatically. If you are not able to see this LD in your operating system you have to initialize the LD with "megacli -LDInit" or with the RAID-BIOS.

You can find more detailed examples for experts at LSI RAID Controller.

Can I use the drives without configuring RAID?

In the models based on the Dell PowerEdge R730 (DX151 and DX291) and the Dell PowerEdge R530 (DX141), a JBOD-compatible controller is included (PERC H730/330). In order to use the drives directly, as a so-called JBOD (just a bunch of drives) instead of a RAID, you must enable the JBOD mode of the controller and export the desired drive as JBOD.

# Only DX151/DX291 (PowerEdge R730) and DX141 (PowerEdge R530)
# Activate JBOD in the Controller
megacli -AdpSetProp -EnableJBOD -1 -a0
# Make the drive in Slot 0 available as JBOD
megacli -PDMakeJBOD -PhysDrv[32:0] -a0

In the models based on the Dell PowerEdge R720 (DX150 and DX290), you need to use a workaround because the built-in controller does not support JBOD directly. You can circumvent this limitation by configuring each drive as an individual RAID 0. That way, you essentially have a JBOD configuration. Please enter the following command in the Rescue System to achieve that configuration.

megacli -CfgEachDskRaid0 WB RA Direct CachedBadBBU -a0

What is the KVM function and how do I use it?

The KVM function, more specifically the KVM over IP function, enables you to use the server over a network just as if you were directly in front of the machine with a screen, a keyboard, and a mouse directly attached. When you log on to the iDRAC, you see a preview of the current video output of the server on the right third of the website.

iDRAC overview

By clicking on "Launch" next to the preview and confirming all requests, you will initiate a live connection that will enable you to use the server just as any other computer. For some special key combinations (for example Ctrl-Alt-Delete), you need to use the menu entry "Macros" of the KVM window.

KVM window

How do I turn my server on/off and how do I restart it?

You can either use the "Quick Launch Tasks" in the "Overview" of the iDRAC or you can use the menu entry "Power" of the KVM window.

How do I mount an ISO image?

Simply use the option "Virtual Media" in the KVM window and then "Launch Virtual Media". After confirming all requests, you will see another window, in which you can select and mount local drives. There, you can also click on "Add Image" and select an ISO image. After that, check the box "Mapped" left of the newly added ISO image entry in order to make the image available to the server as a drive.

Mount image

If you restart the server now, you can boot from the image just as you could from any other drive. To do so, please press F11 to go to a boot menu when you see the message to press F11. An even easier way to boot from the image is to select the entry "Virtual CD/DVD/ISO" in the menu "Next Boot" of the KVM window.

How do I mount operating system images from the Hetzner Mirror or Storage Box?

To help our clients install Windows or VMware ESXi, we provide a number of images of those operating systems.

You can find the images we offer on two of our mirrors:

  • http://download.hetzner.de/ You can access this from anywhere, and it requires a username and password to login. You can find these details at the end of your server activation email, the email in which we at Hetzner Online sent you the login details for the server itself.
  • http://mirror.hetzner.de/ You can only access this from the Hetzner network, and it does not require a password.

The following examples use the internal mirror, though there is also a link to the external mirror below. You can use this link to the external mirror to check the exact file names of the operating system images.


The Windows images we have can be found under http://download.hetzner.de/bootimages/windows/.

These Windows images are straight from Microsoft and don't include any changes from us. They do not come with a license, and can thus be used to install a clean Windows on the server, which can then be activated with your own license key.

Mount an image via the iDRAC
  • The Image File with Path name can be copied directly from our mirror.
    • Example: //mirror.hetzner.de/windows/SW_DVD9_Win_Svr_STD_Core_and_DataCtr_Core_2016_64Bit_English_-2_MLF_X21-22843.ISO
  • The User Name and Password fields can be left blank as they are not needed.
  • The iDRAC should now display the value „Connected“ under „Connection Status ...“
  • From now on you should be able to set the next start option to „Virtual CD/DVD/ISO“ using the Java Applet. Alternatively, you can select the corresponding entry via the boot menu (F11) at the BIOS POST screen.

VMware ESXi

The VMware images we have can be found under http://download.hetzner.de/bootimages/vmware/

The VMware images can be mounted in the same way as the Windows images (as shown above).

  • The Share Name needs to be "vmware" instead of “windows”.
    • Example: //mirror.hetzner.de/vmware/VMware-VMvisor-Installer-6.5.0-4564106.x86_64.iso

Using the Storage Box

Our Storage Box products are reachable via SAMBA/CIFs (if switched on), meaning it can be used to host an image which can then be mounted via the iDRAC.

Mount an image via the iDRAC using the Storage Box
  • <username> is the username of your Storage Box.
  • <file_name> is the file name of the ISO file.
    • If you have placed the ISO file in a sub-folder then please specify that before the file name. For example: <username>.your-storagebox.de/backup/installimages/<file_name>
  • The password is the one you have set for the Storage Box.

OS Deployment via the LCC (Lifecycle Controller)

Your DELL Server has an "OS Deployment" function that is integrated into your server's lifecycle controller. This function provides the necessary drivers for the operating system and accompanies you by graphical wizards in creating a RAID array, if there is no RAID existing on your server.

Please note that DELL only supports certified operating systems via this function. These may vary from model to model. For an overview of the operating systems for your rented product, please visit the corresponding DELL website.

R720 (DX150/DX290):

R530 (DX141):

R730 (DX151/DX291:

If you would like to use the "OS Deployment" functionality, you must first choose an image of your choice from our mirror or your Storage Box. As soon as you have chosen the image you need to restart your server and boot it into the LCC by pressing "F10" in the BIOS POST. The following example shows how to use the OS Deployment feature with Windows Server 2016.

LCC Deploy
  • When the server is booted up into the LCC, click on "OS Deployment" in the selection on the left side, then on "Deploy OS"
O/S Deploy Step 1
  • If you have not yet configured a RAID, you can now configure it by using this wizard. If a RAID already exists on your server, please select "Go Directly to OS Deployment".
O/S Deploy Step 2
  • In the next step, select whether you want to install the operating system in the BIOS or UEFI bootmode. Then select the operating system you want to install from the drop-down menu.
  • Click "Next" and the server will collect the drivers required for the installation of your chosen operating system.
O/S Deploy Step 3
  • In the third step, select "Manual Install" and click on "Next". Afterwards the DELL server will validate the operating system image.
O/S Deploy Step 4
  • In the fourth step, simply click on "Next", because the image was previously integrated via the iDRAC.
O/S Deploy Step 5
  • In the fifth and last step you will see an overview with the selected settings. Click "Finish" if the settings are correct. Afterwards the server will reboot and is going to start the Windows setup.
O/S Drivers
  • If drivers are missing after the operating system installation, you have a virtual drive where drivers are available for the operating system. This drive is automatically named "OEMDRV" by the server.

How do I diagnose hardware problems?

Under Overview in the iDRAC, you will find a general summary of the condition of certain groups of server components under the heading Server Health. If there is a green check mark next to the group, everything is ok. If you would like to see details about a group of components or about an error that is displayed, just click on the group (for instance Fans). If you see an error, you can either check the technical manual whether or not it is a serious problem, or you include the error message when contacting the Hetzner support staff via Robot.

What is the Dell Open Manage System Administrator Suite (OMSA)?

OMSA enables you to perform certain hardware configuration tasks and to monitor the hardware directly through the operating system. You can find more information about OMSA at the Dell website and under linux.dell.com.

How do I use hardware monitoring?

The iDRAC provides operating system independent comprehensive monitoring of all system components.

In order to use the notification capabilities, a DNS name and a DNS domain need to be configured in the network settings of the iDRAC. To configure this, enter the webinterface and go to iDRAC Settings and then Network. Here, you can enter a domain that you managed under the static DNS domain name. For example:

  • DNS DRAC Name: idrac-hetzner-r720
  • Static DNS Domain name: example.com

The system will now send emails with the sender address <idrac-hetzner-r720@example.com>.

Now, you can both add destination email addresses and configure an SMTP server, all via the menu Alerts -> SNMP and E-mail Settings.

Here, you can enter email addresses to be notified of system events in the E-mail Alert 1 to E-mail Alert 4 fields.

Under SMTP (E-Mail) Server Address Settings, you need to configure the appropriate SMTP server.

Finally, by clicking on the button send, you can send a test email to the addresses you entered. If the email is temporarily not delivered (eg. due to greylisting) you will receive an error message. In this case, the email will be cached for later delivery.

How do I secure the iDRAC?

To secure the iDRAC against unauthorized access beyond just changing the password, you can configure IP filtering and blocking. It is possible to restrict access to either a single IP address or a range of IP addresses.

To configure this, enter the web interface and go to iDRAC Settings and then Network. Click on the link Advanced Settings. Here, you can enter an IP address and a subnet mask from which access is allowed. To limit access to a single IP address, enter as the subnet mask ( is not supported by the iDRAC). To allow access from a range of IP addresses, a subnet mask must be entered which, when combined with the IP address, contains all IP addresses from which access should be permitted.

SSH connections to the iDRAC are disabled on all Hetzner systems by default. Depending on your needs, you can activate ssh connections as well.

What kinds of memory configurations are available?

The Dell PowerEdge offers several configuration options for the system memory to suit for different applications and requirements. In the optimized default configuration, the full capacity and performance are offered. The ECC standard allows for single-bit errors to be corrected and multi-bit errors to be detected. For even greater demands beyond that, the following configurations are possible:

  • Mirroring - The memory content is kept redundantly. For maximum security, only half the storage capacity is available.
  • Advanced ECC - Additional error correction through more elaborate checks during memory access. The storage capacity is reduced by 33%. High performance, but less than with the optimized configuration.
  • Sparing - One bank is used as a spare. If one memory bank fails, the systems switches to the spare on the fly. The storage capacity is reduced by 33% to 50%.

Which hardware configurations are available?

You can find our current Dell offers on our website.

Which RAID controller does the server use?

The integrated PERC is a powerful enterprise class RAID controller.

  • DX151/DX291: PERC H730 with 1GB cache (LSI SAS 3108)
  • DX150/DX290: PERC H710 with 512MB cache (LSI SAS 2208)
  • DX141: PERC H330 (LSI SAS 3008)

The flash-backed cache provides reliability and fault tolerance.

Which RAID levels are supported?

  • DX151/DX291 with PERC H730: JBOD, 0, 1, 5, 6, 10, 50, 60
  • DX150/DX290 with PERC H710: 0, 1, 5, 6, 10, 50, 60
  • DX141 with PERC H330: JBOD, 0, 1, 5, 10, 50

Where do I find additional information?

Dell PowerEdge R720

Dell offers an Owner's Manual (PDF) as well as a Technical Guide (PDF).

Dell PowerEdge R730

Dell offers an Owner's Manual (PDF).

Dell PowerEdge R530

Dell offers an Owner's Manual (PDF).


In order to process your support enquiries as quickly and efficiently as possible, please send your requests directly via the Robot administration interface.

Our goal is to answer your support requests about technical matters
within two hours.

Please note, however, that this goal is not legally-binding,
and therefore does not represent any contractual agreement. This 2-hour
goal is merely a guideline based on our experience, but it is one that
we strive to uphold.

To contact us via telephone, please check our website for the appropriate number: hetzner.de

If contacting our technicians in the DC directly (available 24/7), a telephone password is required to enable them to perform any work on the server.

An FAQ for our dedicated root servers can be found here: Dedicated Root Server FAQ

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