I have a RAID 0 (2x 300GB drives) with Windows 7 and Ubuntu 13.10 (58GB ext4 partition, with 5GB swap partition) on them. I have just managed to get my dual boot working.

However, as I went to update some software in Ubuntu Software centre the "Configuring grub-pc" window popped up and shows the following:

  • /dev/sda (300069MB; WDC_WD3000GLFS-01F8U0)
  • /dev/sdb (300069MB; WDC_WD3000GLFS-01F8U0)
  • /dev/sdc (2000000MB; xxxxxxxxxxxxxxxxxxxx) (I know this one is just my external SATA drive)
  • /dev/mapper/isw_dcgidgaidc_Win7 (536871GB; isw_dcgidgaidc_Win7)
  • /dev/mapper/isw_dcgidgaidc_Linux (63257GB; isw_dcgidgaidc_Linux) (looks like my ext4 +swap)
  • /dev/mapper/isw_dcgidgaidc_Linux2 (58012GB; isw_dcgidgaidc_Linux) (just my ext4)

Which of these should I tick to update/install Grub on??

EDIT: If I do:

df | grep /$

it says:


Just select the ext4 partition where ubuntu is installed.

  • So /dev/mapper/isw_dcgidgaidc_Linux2? – user997112 Dec 12 '13 at 3:14
  • yes you are correct choose that. – Avinash Raj Dec 12 '13 at 3:16
  • Which I click "forward" it has a screen saying "continue without installing grub?", if I leave it unticked and then click "forward" it takes me back to the list of drives/partitions.... – user997112 Dec 12 '13 at 3:17
  • 1
    click space bar which allows you to select the partition. – Avinash Raj Dec 12 '13 at 3:18
  • Should I select the top 2x drives as well, because the Linux partition is across both of them? – user997112 Dec 12 '13 at 3:18

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