Configuring Disk Space Notifications You should regularly review your disk capacity and when disks are getting full, take preventative measures to maintain service. A warning alert email notification is sent to the administrator account when disk space is low. The default is to send a warning alert when the threshold reaches 85% and a critical alert when the threshold reaches 95%. You can change these values. Use zmlocalconfig to configure the disk warning thresholds. Warning alerts: zmdisklog_warn_threshold Critical alert: zmdisklog_critical_threshold When starting services with zmcontrol, if the threshold is exceeded, a warning is displayed before the services are started. You should clean up your disk to free up space.