Disconnect the Raid set

English Install/Boot/Login
1

Good evening everyone!

I would like to disconnect a disk from a raid set.

The raid set looks like this:

beheerder@server50:~> cat /proc/mdstat 
Personalities : [raid1] 
md127 : active raid1 sdb1[1] sda1[0]
      976760640 blocks super 1.0 [2/2] [UU]
      bitmap: 2/8 pages [8KB], 65536KB chunk


unused devices: <none> beheerder@server50:~>

This raid 1 is linked to / see below:

beheerder@server50:~> cat /etc/fstab 
UUID=5270a95b-6083-4c58-9af9-e0197c384d7d /                    ext4       acl,user_xattr        1 1
UUID=12bdd264-0f8a-42d3-836d-2413ba19df41 /backup              ext4       acl,user_xattr        1 2
beheerder@server50:~>

And then I want to mount the other drive I removed from the raid again at another mount point.

Does anyone have an idea how to do this properly and safely?

Normally I would play around myself but since this is my server with all my data I want to make sure that it goes well and so do not have a broken startup disk

so I would like to hear opinions on how you would do it

Thanks,

Laters
Wesley

2

https://lists.opensuse.org/opensuse/2017-05/msg00017.html looks like a good explanation how to separate.

Using the separated disk is not something I’ve actually tried, though I’ve thought about it more than once. I suppose the separated disk would have to be added to a new md device, and have its label and UUID made unique, e.g. with tune2fs -U -L, unless mounted to a different PC than the original md device, or the original not connected and powered at the same time.

3

Thanks, I will look into it

4

If you want to do an Internet search,
I believe the terminology and keyword you should use is “breaking” the RAID array.

TSU