MDADM - Adding a new hard disk to an existing RAID1
Aug 20, 2021 · With mdadm, there is a migration path to go from raid1 to raid5. So all you need is a new drive, partition it accordingly, and then grow your existing raid. For 2 disks, mdadm's …
Mdadm array is inactive, how to fix? - Unix & Linux Stack Exchange
Jan 17, 2025 · I have a RAID5 array configured with MDADM in Ubuntu 24.04 LTS. The array consists of five 8TB drives, and there have been no changes to it recently. Today I noticed that …
mdadm - Recommended approach for booting from Linux …
Aug 9, 2020 · I am looking for the recommended approach to setting up software RAID (using mdadm) on Centos 8 to provide redundancy. In my setup I have 4 identical disks, but I assume …
Fixing missing superblocks on both RAID1 disks using mdadm
Apr 28, 2022 · My RAID1 array was working fine at /dev/md128 but seems to have completely disappeared after a reboot, with mdadm reporting both disks are missing superblocks. My …
raid - How to resize RAID1 array with mdadm? - Server Fault
8 16 488386584 sdb 152248005 blocks of 1024 bytes is consistent with the size mdadm --grow and resize2fs are reporting for md2. Did you initially create these partitions with a smaller size, …
raid - Recovering RAID5 - using Linux "mdadm" - Server Fault
Dec 5, 2022 · Have you checked the status of the members of the array? What is the output of dmesg after the mdadm --run command? It could be that two of your devices are broken, …
mdadm: Value "arch1:2021" cannot be set as devname. Reason: …
In your case, if arch1:2021 was not intended to mean /dev/md2021, but to use 2021 as a name, it's unfortunately the case that mdadm does not distinguish hostname, number (preferred …
How to configure mdadm.conf properly - Unix & Linux Stack …
May 26, 2022 · I have 2 mdadm arrays. Long time ago, when there was only one raid, i wrote mdadm.conf and it looked like this: # mdadm.conf written out by anaconda MAILADDR root …
mdadm mdadm: cannot open /dev/sda1: Device or resource busy
The output is: mdadm mdadm: cannot open /dev/sda1: Device or resource busy I have verified this has nothing to do with DM: ]# dmsetup status No devices found The file system is GPT, I …
mdadm: How to force a parity check? - Server Fault
Jan 3, 2025 · I found another command: sudo mdadm --action=check /dev/md127 This now worked, though I am not sure if it is the same. A bit confusing; the man page doesn't even …