2
Filesystem                           Size  Used Avail Use% Mounted on
    udev                                 252G     0  252G   0% /dev
    tmpfs                                 51G  1.9G   49G   4% /run
    /dev/md7                             438G   32G  384G   8% /
    tmpfs                                252G  884K  252G   1% /dev/shm
    tmpfs                                5.0M     0  5.0M   0% /run/lock
    tmpfs                                252G     0  252G   0% /sys/fs/cgroup
    /dev/md6                             453M  200M  230M  47% /boot

I want to move /boot to /dev/md7 and remount /dev/md6 on /test.

I followed the instructions posted earlier here. I got this error while running:

grub-install
Installing for i386-pc platform.
grub-install: error: install device isn't specified.
/boot is in /
/dev/md7                            438G   32G  384G   8% /
Melebius
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Adel Farhad
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  • x86_64 4.4.0-31-generic Linux sandstone 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux..however when i run grub-install i get error grub-install Installing for i386-pc platform. grub-install: error: install device isn't specified. – Adel Farhad May 01 '18 at 14:49
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    Please [edit] your question to add details. The command grub-install requires a parameter – the drive to be installed to. – Melebius May 01 '18 at 15:24
  • @Melebius i have edited the comment. do i have to do grub-install /dev/md7 or grub-install /dev/sda.. also once i move /boot under / does it needs to be mounted as /boot – Adel Farhad May 01 '18 at 15:42
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    I am sorry, I don’t have any experience with doing this on mdX which is probably supposed to be RAID. You should note that in your question (including tags) and wait for someone experienced to help. It’s easy to get an unbootable system while partitioning. – Melebius May 01 '18 at 17:28

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