ubuntu@ubuntu:~$ sudo apt-get update
Ign:1 cdrom://Ubuntu 19.10 _Eoan Ermine_ - Release amd64 (20191017) eoan InRelease
Hit:2 cdrom://Ubuntu 19.10 _Eoan Ermine_ - Release amd64 (20191017) eoan Release
Get:4
http://archive.ubuntu.com/ubuntu eoan InRelease [255 kB]
Get:5
http://security.ubuntu.com/ubuntu eoan-security InRelease [97.5 kB]
Get:6
http://archive.ubuntu.com/ubuntu eoan-updates InRelease [97.5 kB]
Get:7
http://archive.ubuntu.com/ubuntu eoan/main amd64 Packages [969 kB]
Get:8
http://security.ubuntu.com/ubuntu eoan-security/main amd64 Packages [149 kB]
Get:9
http://security.ubuntu.com/ubuntu eoan-security/main Translation-en [55.6 kB]
Get:10
http://security.ubuntu.com/ubuntu eoan-security/main amd64 DEP-11 Metadata [204 B]
Get:11
http://security.ubuntu.com/ubuntu eoan-security/main DEP-11 48x48 Icons [29 B]
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http://security.ubuntu.com/ubuntu eoan-security/main DEP-11 64x64 Icons [29 B]
Get:13
http://security.ubuntu.com/ubuntu eoan-security/main amd64 c-n-f Metadata [1940 B]
Get:14
http://security.ubuntu.com/ubuntu eoan-security/restricted amd64 Packages [10.5 kB]
Get:15
http://security.ubuntu.com/ubuntu eoan-security/restricted Translation-en [1652 B]
Get:16
http://archive.ubuntu.com/ubuntu eoan/main amd64 DEP-11 Metadata [510 kB]
Get:17
http://archive.ubuntu.com/ubuntu eoan/main DEP-11 48x48 Icons [95.4 kB]
Get:18
http://archive.ubuntu.com/ubuntu eoan/main DEP-11 64x64 Icons [173 kB]
Get:19
http://archive.ubuntu.com/ubuntu eoan/main amd64 c-n-f Metadata [29.7 kB]
Get:20
http://archive.ubuntu.com/ubuntu eoan-updates/main amd64 Packages [226 kB]
Get:21
http://archive.ubuntu.com/ubuntu eoan-updates/main Translation-en [86.5 kB]
Get:22
http://archive.ubuntu.com/ubuntu eoan-updates/main amd64 DEP-11 Metadata [73.0 kB]
Get:23
http://archive.ubuntu.com/ubuntu eoan-updates/main DEP-11 48x48 Icons [9953 B]
Get:24
http://archive.ubuntu.com/ubuntu eoan-updates/main DEP-11 64x64 Icons [15.1 kB]
Get:25
http://archive.ubuntu.com/ubuntu eoan-updates/main amd64 c-n-f Metadata [2932 B]
Get:26
http://archive.ubuntu.com/ubuntu eoan-updates/restricted amd64 Packages [10.5 kB]
Get:27
http://archive.ubuntu.com/ubuntu eoan-updates/restricted Translation-en [1652 B]
Fetched 2872 kB in 5s (558 kB/s)
Reading package lists... Done
ubuntu@ubuntu:~$ sudo apt-get install mdadm
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
default-mta | mail-transport-agent dracut-core
The following NEW packages will be installed:
mdadm
0 upgraded, 1 newly installed, 0 to remove and 271 not upgraded.
Need to get 416 kB of archives.
After this operation, 1252 kB of additional disk space will be used.
Get:1
http://archive.ubuntu.com/ubuntu eoan-updates/main amd64 mdadm amd64 4.1-2ubuntu3.2 [416 kB]
Fetched 416 kB in 1s (402 kB/s)
Preconfiguring packages ...
Selecting previously unselected package mdadm.
(Reading database ... 188618 files and directories currently installed.)
Preparing to unpack .../mdadm_4.1-2ubuntu3.2_amd64.deb ...
Unpacking mdadm (4.1-2ubuntu3.2) ...
Setting up mdadm (4.1-2ubuntu3.2) ...
Generating mdadm.conf... done.
update-initramfs is disabled since running on read-only media
/usr/sbin/grub-probe: error: failed to get canonical path of `/cow'.
Created symlink /etc/systemd/system/mdmonitor.service.wants/mdcheck_start.timer → /lib/systemd/system/mdcheck_start.timer.
Created symlink /etc/systemd/system/mdmonitor.service.wants/mdmonitor-oneshot.timer → /lib/systemd/system/mdmonitor-oneshot.timer.
mdcheck_continue.timer is a disabled or a static unit, not starting it.
Processing triggers for man-db (2.8.7-3) ...
ubuntu@ubuntu:~$ ^C
ubuntu@ubuntu:~$ sudo mdadm --assemble --scan
mdadm: No arrays found in config file or automatically
ubuntu@ubuntu:~$