I'm currently running 6.3.0.3 on one of my sensors that is experiencing this issue. Usage racked up during an upgrade attempt to 6.4.0. Update failed and started producing the high Unmanaged Disk usage on /Volume. I opened a ticket and cleared down to 63% used. I ran the PMTOOL, rebooted the sensor and FMC several times. I'm still receiving the High Disk Usage alert and unable to upgrade. Tech recommended that I reimage the sensor, but I'm open to ideas before I settle for a reimage. Any thoughts. Below are the logs for the upgrade attempt:
root@firepower:/var/log/sf/Cisco_Network_Sensor_Upgrade-6.4.0# tail -f status.log
ui:[17%] Running script 200_pre/201_disable_faild.sh...
ui:[18%] Running script 200_pre/202_disable_syncd.sh...
ui:[18%] Running script 200_pre/400_restrict_rpc.sh...
ui:[19%] Running script 200_pre/470_revert_prep.sh...
ui:[19%] Running script 200_pre/500_stop_system.sh...
ui:[21%] Running script 200_pre/600_ftd_onbox_data_export.sh...
ui:[21%] Running script 200_pre/999_enable_sync.sh...
ui:[24%] Running script 300_os/200_check_chroot_mount.sh...
ui:[36%] Running script 600_schema/100_update_database.sh...
ui:[36%] Fatal error: Error running script 600_schema/100_update_database.sh. For more details see /var/log/sf/Cisco_Network_Sensor_Upgrade-6.4.0/600_schema/100_update_database.sh.log on the device being upgraded.
_update_database.sh.log
root@firepower:/var/log/sf/Cisco_Network_Sensor_Upgrade-6.4.0/600_schema# tail -f 100_update_database.sh.log
[191028 02:51:40:685] Root disk free = 2622700K, Var disk free = -K
Checking free /var disk space...
Find largest table in /var/lib/mysql ...
ls: cannot access /var/lib/mysql/sfsnort: No such file or directory
expr: syntax error
expr: syntax error
Checking for K of /var disk space to upgrade the database
expr: syntax error
Total /var disk space needed for upgrade is
./functions.install: line 1302: / 2: syntax error: operand expected (error token is "/ 2")
