A Fail event had been detected on md device /dev/md2.
It could be related to component device /dev/sdb2.
Faithfully yours, etc.
P.S. The /proc/mdstat file currently contains the following:
Personalities : [raid1] [raid0] [raid6] [raid5] [raid4] [linear] [multipath] [raid10]
md4 : active raid1 sda4[0] sdb4[1]
3884960704 blocks [2/2] [UU]
bitmap: 10/29 pages [40KB], 65536KB chunk
md2 : active raid1 sdb2[1](F) sda2[0]
20478912 blocks [2/1] [U_]
unused devices: <none>
Then, 4 hours later :
A DegradedArray event had been detected on md device /dev/md2.
Faithfully yours, etc.
P.S. The /proc/mdstat file currently contains the following:
Personalities : [raid1] [raid0] [raid6] [raid5] [raid4] [linear] [multipath] [raid10]
md4 : active raid1 sda4[0] sdb4[1]
3884960704 blocks [2/2] [UU]
bitmap: 4/29 pages [16KB], 65536KB chunk
md2 : active raid1 sdb2[2](F) sda2[0]
20478912 blocks [2/1] [U_]
unused devices: <none>
The server was crashed. Itâs a proxmox server.
I rebooted, it started (still in degraded mode, expected), but minutes later crashed again.
7 years ago, Proxmox itself did not really support MD based systems, it was possible with a Debian Install and Proxmox on top.
Proxmox now supports so much more different systems (Samba for VMs - Iâld still prefer NFSâŠ).
Disks can also die with ZFS, but it is Rock Solid (Written n Capitals!).
I have switched all systems to use ZFS Storage except for 3 systems using a hardware RAID for system. These three all have a PCIx NVME controller with mirrored ZFS formatted NVMEs.