Overall installation flow

  1. Make sure that your motherboard BIOS is set to Legacy boot
  2. Start following Install Debian OS
  3. Reach Step 5 in regular installation path
  4. Return to this section of Installation Special Cases and start following steps described below
  5. Finish all steps from Special case Step 11 - Install Debian to a RAID array depicted below
  6. Return to Step 16 and finish following Install Debian OS
  7. Reboot the server
  8. Complete Install the boot loader (GRUB) steps detailed below
  9. Reboot the server

For advanced users, there are other options that are theoretically possible but were not tested by our team:
Software BIOS RAID: https://wiki.debian.org/DebianInstaller/SataRaid
Hardware RAID: Check your raid controller settings

Setting up the RAID array (41 steps)

Step 11.1. Change partitioning type

Set the partition of the disk to "Manual"

Step 11.2. Select the first drive

Select the first drive that you're going to use in RAID1 array

Step 11.3. Create first empty partition table

Create the partitioning table for the first drive

Step 11.4. Select the second drive

Select the second drive for the RAID array

Step 11.5. Create second empty partition table

Create the partitioning table for the second drive

Step 11.6. Configure software RAID

Now we need to configure software RAID. Select "Configure software RAID" option

Step 11.7. Confirm RAID configuration

Confirm writing operations to the storage drives for RAID configuration

Step 11.8. Start MD configuration

Select "Create MD device" option and proceed

Step 11.9. Select array type

Select RAID1 array type

Step 11.10. Set the number of drives

Enter the number of drives in the array. Enter "2" if you are following our manual

Step 11.11. Set the number of spares

Enter the number of spares in the array. Enter "0" if you are following our manual

Step 11.12. Select drives for the array

Select drives you want added to the RAID1 array. Select all drives if you are following our manual

Step 11.13. Confirm change of partitioning tables

Confirm writing operations to the storage drives for RAID configuration

Step 11.14. Finish disk partitiong

Select "Finish" to finish disk partitioning

Step 11.15. Start LVM configuration

Start configuring the Logical Volume Manager (LVM)

Step 11.16. Keep existing partitioning

Confirm keeping current partitioning layout for LVM

Step 11.17. Create volume group

Select "Create volume group" option

Step 11.18. Name the LVM group

Enter LVM group name."Ggrock-vg" is used in this installation

Step 11.19. Select previously created MD device

Select the MD device that we've created prior

Step 11.20. Confirm keeping partitioning layout

Confirm keeping current partitioning layout for LVM

Step 11.21. Create the first LV

Creating first logical volume. Select "Create logical volume"

Step 11.22. Select the LVM

Select the LVM we have created previously

Step 11.23. Name the first LV

Enter logical volume name. "root" is used in this installation

Step 11.24. Set first LV size

Enter "16G: value as the local volume size. 16G value is recommended

Step 11.25. Create the second LV

Creating the second logical volume. Select "Create logical volume"

Step 11.26. Select the LVM again

Select previously created LVM

Step 11.27. Name the second LV

Enter logical volume name. "swap_1" is used in this installation

Step 11.28. Set second LV size

Enter "4G: value as the local volume size. 4G value is recommended

Step 11.29. Confirm all previous changes

Confirm the changes performed in the previous steps. Two partitions, one MD device, LVM group and two logical volumes created

Step 11.30. Format the root volume

Format root volume. Select the root volume that was created previously. Pay attention to the name next to the LV. During this installation it should be "LV root"

Step 11.31. Set "Use as" value

Select "Do not use" for the "Use as" setting for the partition

Step 11.32. Set the file system

Select "Ext4 journaling file system" as the partition format

Step 11.33. Set mount point

Select Mount point as setting to set

Step 11.34. Set mount point setting

Select "/ - root file system" value for the Mount point setting

Step 11.35. Confirm partition setup

Select "Done setting up the partition" option to confirm the changes

Step 11.36. Format swap volume

Select the swap volume that was created previously. Pay attention to the name next to the LV. During this installation it should be "LV swap_1"

Step 11.37. Set "Use as" value for second partition

Select "Do not use" for the "Use as" setting for the partition

Step 11.38. Set swap area format

Select "swap area" as the partition format

Step 11.39. Confirm second partition setup

Select "Done setting up the partition" option to confirm the changes

Step 11.40. Finish the partition setup

Finish partitioning by selecting "Finish partitioning and write changes to disk" option

Step 11.41. Confirm all changes

Finally, confirm all of the changes made above

Upon completing this step you should resume the main Debian Installation flow from Step 17. Configure package manager

Install the boot loader (GRUB, 6 steps)

After the installation is completed you should install the boot loader to all disks in your RAID array. By default Debian installer installs the boot loader only to one disk in the RAID array. You should install the boot loader to all other disks in your array to allow booting on disk failures, as well as in case when you reorder your drives.

Step 1. Login

Login as the root user.

Your login is: root
Your password is: whatever you set in Step 7. Set your root password.

It is okay to not see the password characters as you enter them. Enter the password and press Enter

Depending on your platform firmware (BIOS or UEFI) execute one of the commands below

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Step 2.1. BIOS mode

Enter this in the console:

1 dpkg-reconfigure grub-pc

And press Enter

--- or ---

Step 2.2. UEFI mode

Enter this in the console:

1 dpkg-reconfigure grub-efi-amd64

And press Enter

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Step 3. Start GRUB PC configuration

Press "ok" when presented with this modal. Linux command modal should remain empty

Step 4. Supply GRUB parameters

Press "ok" when presented with this modal. Linux command modal should read "quiet"

Step 5. Select RAID drives

Select all drives that you have been added to the RAID array during the Installing OS on RAID array steps and press "OK"

Step 6. Reboot the server

After this you should be all good and set up with the Debian Software RAID.

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