From SSH:
```
root@cloudvirt2004-dev:~# less /var/log/puppet.log
-bash: /usr/bin/less: Input/output error
root@cloudvirt2004-dev:~# dmesg
-bash: /usr/bin/dmesg: Input/output error
fnegri@cloudvirt2004-dev:~$ cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sdb2[0](F) sda2[1]
467894272 blocks super 1.2 [2/1] [_U]
bitmap: 1/4 pages [4KB], 65536KB chunk
unused devices: <none>
fnegri@cloudvirt2004-dev:~$ sudo mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Fri Sep 15 13:27:22 2023
Raid Level : raid1
Array Size : 467894272 (446.22 GiB 479.12 GB)
Used Dev Size : 467894272 (446.22 GiB 479.12 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Wed Oct 4 22:21:16 2023
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 1
Spare Devices : 0
Consistency Policy : bitmap
Number Major Minor RaidDevice State
- 0 0 0 removed
1 8 2 1 active sync /dev/sda2
0 8 18 - faulty /dev/sdb2
```
In `console com2`:
```
[2149618.979982] I/O error, dev sda, sector 95684040 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
[2149618.988936] I/O error, dev sda, sector 95684040 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
[2149623.774999] megaraid_sas 0000:65:00.0: Controller in crit error
[2149668.758769] I/O error, dev sda, sector 95684040 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
```