Comments on: Setting up RAID 1 (Mirroring) using ‘Two Disks’ in Linux – Part 3

By: Rando

Rando — Tue, 04 Apr 2023 18:49:52 +0000

For a newbie, would you be able to add instructions on what the process to replace a hdd in the event of a failure.

By: Wayno

Wayno — Wed, 23 Jun 2021 03:06:23 +0000

I followed your directions. For some reason, it changed md0 to md127. Adjusted /etc/fstab and /etc/mdadm/mdadm.conf and it works as advertised now. Thank you for this guide. Wayno

By: Ron

Ron — Tue, 04 May 2021 15:35:08 +0000

In reply to Alok Chaudhary.

You might try to add in manually “sudo mdadm /dev/md0 –add /dev/sdxx” (xx being the drive that shows removed).

By: Alok Chaudhary

Alok Chaudhary — Wed, 21 Apr 2021 11:32:50 +0000

How to replugged in the hard drive after testing because once I remove the hard disk it’s always showing remove. Have you any idea how I resync the same hard disk that I remove for just testing?

By: Rik

Rik — Tue, 02 Mar 2021 12:29:29 +0000

Just set up my raid1 on ubuntu! thanks a lot for this tutorial.

I have a question:

What do you need to do when one of the drives fails and you need to replace it?

Will mdadm recognize the new drive and start copying from the old (still working) drive?