Finally a question I might be able to help with! I'm so excited! I can think
of many ways to get more information to help alleviate the confusion. I'd
suggest starting with an LVM scan of physical volumes: "pvscan -v". That
will tell you weather LVM is using 'md#' devices, or the hardware directly
('sd#' devices). You could also query the hard drives with mdadm for RAID
headers. I think the command would be " mdadm --query /dev/sd#.
On September 18, 2014 1:28:23 PM PDT, Mark Phillips
<[email protected]> wrote:
>I am confused about a RAID1 and LVM installation using Ubuntu 14.04
>server.
>I have a new System 76 Gazelle Pro laptop with two 1 TB SSD drives. I
>re-installed the system using the server version of 14.04 so I could
>have
>the installer create the raid and lvm. I followed this blog post -
>http://blog.miketoscano.com/?p=307, and the steps in the installer to
>create the raid and then the lvm, and then install the OS, and it all
>seemed to work. I then installed the ubuntu-desktop and then the
>system76
>drivers. It all seems to be working.
>
>However, I cannot find mdadm. It does not appear to be installed. I
>looked
>at /etc/fstab and I see
>mark@tsunami:~$ cat /etc/fstab
># /etc/fstab: static file system information.
>#
># Use 'blkid' to print the universally unique identifier for a
># device; this may be used with UUID= as a more robust way to name
>devices
># that works even if disks are added and removed. See fstab(5).
>#
># <file system> <mount point> <type> <options> <dump> <pass>
>/dev/mapper/vg1_tsunami-root / ext4 errors=remount-ro 0 1
>/dev/mapper/vg1_tsunami-swap none swap sw 0 0
>
>And the free space shows
>mark@tsunami:~$ df -h
>df: ‘/run/user/107/gvfs’: Permission denied
>Filesystem Size Used Avail Use% Mounted on
>/dev/mapper/vg1_tsunami-root 1.8T 120G 1.6T 7% /
>none 4.0K 0 4.0K 0% /sys/fs/cgroup
>udev 7.8G 4.0K 7.8G 1% /dev
>tmpfs 1.6G 1.2M 1.6G 1% /run
>none 5.0M 0 5.0M 0% /run/lock
>none 7.8G 144K 7.8G 1% /run/shm
>none 100M 40K 100M 1% /run/user
>
>There is no mdadm.conf.
>]mark@tsunami:~$ sudo locate mdadm
>[sudo] password for mark:
>/usr/share/bash-completion/completions/mdadm
>
>And mdstat does not seem correct from what I have read.
>]mark@tsunami:~$ cat /proc/mdstat
>Personalities :
>unused devices: <none>
>
>Am I missing something? Do I really have what I intended to install? I
>don't want to pull all my files over to the machine until I am sure it
>is
>working as intended.
>
>Thanks,
>
>Mark
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