linux – centos 8 disk is no longer visible in the system

I have a server with two disks. One of the disks has a Centos 8 system. The other is written in fstab to automatically mount it.
Today I noticed that after doing the fdisk -l operation, the second drive is no longer visible in the system. When I tried to enter it from the mount point, I got a message that it is in readonly mode.
The disk was previously visible in the operating system, otherwise the system would not load.

Do you have any idea what could have happened to the disk? Why, while the system is running, suddenly stopped being seen by him?

After the reboot, the disk is still not visible, unfortunately the server is collocation in the data center, so I can not see what is happening in the bios

Regards