because /var has 208GB. It's where Sentora stores the Hostdata, Backups and Temp. So Maybe you didn't updated your backup-module and it creates just dump on your disk.
/dev/mapper/cos-root seems to be your entire partition. Like others have md1 or sda1 and so on.
/dev/mapper/cos-root seems to be your entire partition. Like others have md1 or sda1 and so on.