Solve the problem of disk control separation and safe disk

Disk control controllers generally have built-in SSD disks as coffer disks, and the first disk enclosure is a configuration disk enclosure with 4 coffer disks. I know that the management module will save system configuration data, alarm information, and log information to the SSD safe On the hard disk, what is stored in the coffer disk on the hard disk enclosure and what is stored in the built-in SSD?

Thanks