We are currently trying to run access the data on a server running a HP Ml110 G5 SATA raid controller, using the latest Ubuntu Live CD. We need to delete a few files to let the server boot into Windows but are unable to mount the partitions.

We can see the individual disks via the disk management program but can not mount the partitions, does anyone have any suggestions?

  • 1
    The answer depends entirely on whether you are using hardware or software raid. Do you know? You may have a hardware-raid-capable controller, but be doing it in software.
    – poolie
    Dec 2, 2010 at 23:21

1 Answer 1


For a software raid I'd do the following (but it might work for your controller too?):

Install mdadm (should be on the cd):

sudo apt-get install mdadm
sudo mdadm --assemble --scan

I think this will recognize your raid automatically and it should pop up in nautilus.

Edit: tried it myself on a new system (Ubuntu 11.04 alpha 1 :) and adapted answer

  • This won't work for hardware raid, but running something like mdadm -Q /dev/sd[a-f][1-9] should tell you whether or not they're using software raid.
    – poolie
    Dec 2, 2010 at 23:23
  • 2
    Also, just installing mdadm won't automatically recognize the arrays, and --auto-detect is deprecated. What I would do in a recovery situation is use -Q to understand what disks are present, then mdadm --assemble /dev/md0 /dev/sda1 .... giving the component partitions by hand. It's safer than trying to reproduce normal auto assembly.
    – poolie
    Dec 2, 2010 at 23:26
  • I just had to use it myself, I just installed mdadm, then I did '''sudo mdadm --assemble --scan''' and the software raid poped up in nautilus
    – sBlatt
    Dec 3, 2010 at 10:43
  • Bear in mind that after the mdadm --assemble command it may take a long time to becoume available the drive, because it might be synchronizing the disks
    – user260881
    Dec 29, 2021 at 17:33
  • Confirmed that the command still works in 2022 for Ubuntu 20.04. --assemble --scan is essential.
    – Naofumi
    Oct 24, 2022 at 17:54

You must log in to answer this question.