Software RAID1 configuration

[jzelek95]

Hello,
i have four disks. Two of them are for system and swap, two of them are for / home and other data.
The each pair sets are configured as software RAID1. The configuration was as shown below:


https://pasteimg.com/image/screenshot-45.ck0TH



https://pasteimg.com/image/screenshot-3.ck48s



https://pasteimg.com/image/screenshot-4.ckOa9



https://pasteimg.com/image/screenshot-5.ckekC


After installing the system, everything is fine, the problem is when one drive that has home folders is disconnected.
The system is booting up but can't for the profile status:

https://pasteimg.com/image/screenshot-10.ckv2J

fstab file:

https://pasteimg.com/image/screenshot-2.ck66Y



Does anyone have any suggestions why this configuration doesn't work?

The distribution is Zentyal 7.0 based on Ubuntu. It does not matter whether the system is virtual or installed on a physical machine.
Reconnecting the drive doesn't always help

[rsteinmetz70112]

Did you use mdadm to create the arrays or lvm2?
Did you use uuid to define the arrays or diid you use device names?
If you use device names and you disconnect one drive then the device names may change.

[jzelek95]

I used mdadm and lvm manager to create array and LVM during installation process
In /etc/mdadm/mdadm.conf I have UUID of md device
I tried to use UUID of /dev/mapper/vgzentyal--1-home in fstab file but it doesnt change. After change fstab or mdadm.conf I used update-initramfs

[rsteinmetz70112]

As I was asking about the UUIDs of the drives. See the link below:
https://unix.stackexchange.com/quest...ids-with-mdadm

What does

# cat /proc/mdstat

show when you have a drive disconnected?
I've always been able to disconnect a drive and have a RAID 1 array come up degraded. In fact that general how you replace a failed drive.