[PLUG] Question About RAID and LVM - Ubunu 14.04

Mark Phillips mark at phillipsmarketing.biz
Thu Sep 18 20:28:23 UTC 2014


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 at 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 at 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 at 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 at 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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