Replication error: The directory replication agent (DRA) couldn't update object CN=NTDS Site Settings,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=mydomain,DC=com (GUID fe4f582d-b2e6-4969-92b9-9864a92e51a3) on this system with changes which have been received from source server 76067a70-566f-44a5-9601-1b7fb41389ad._msdcs.mydomain.com. The disk containing the database is full.
Please free up some space on the disk by deleting unnecessary files or moving them to another volume. If the disk is a RAID set, you may be able add additional disks to increase the storage. If the database files and logs are co-located, you may want to separate them. You can move either the files or the logs using the ntdsutil utility program.