$ date; eject
Sun May 29 14:18:00 CDT 2016

$ date; eject
Sun May 29 14:19:41 CDT 2016


/var/log/syslog
May 29 14:17:01 DVR CRON[19034]: (root) CMD (cd / && run-parts --report /etc/cron.hourly)
May 29 14:17:36 DVR kernel: [10599.360855] UDF-fs: INFO Mounting volume 'FLASH_GORDON', timestamp 2007/06/01 21:06 (1ed4)
May 29 14:17:36 DVR udisksd[2751]: Mounted /dev/sr0 at /media/$user/FLASH_GORDON on behalf of uid 1000
May 29 14:17:39 DVR udisksd[2751]: Cleaning up mount point /media/$user/FLASH_GORDON (device 11:0 is not mounted)
May 29 14:17:39 DVR udisksd[2751]: Unmounted /dev/sr0 on behalf of uid 1000

May 29 14:19:59 DVR kernel: [10742.368441] UDF-fs: INFO Mounting volume 'FLASH_GORDON', timestamp 2007/06/01 21:06 (1ed4)
May 29 14:19:59 DVR udisksd[2751]: Mounted /dev/sr0 at /media/$user/FLASH_GORDON on behalf of uid 1000
May 29 14:20:01 DVR CRON[19097]: (smmsp) CMD (test -x /etc/init.d/sendmail && /usr/share/sendmail/sendmail cron-msp)
May 29 14:20:01 DVR sm-msp-queue[19113]: My unqualified host name (DVR) unknown; sleeping for retry
May 29 14:20:02 DVR udisksd[2751]: Cleaning up mount point /media/$user/FLASH_GORDON (device 11:0 is not mounted)
May 29 14:20:02 DVR udisksd[2751]: Unmounted /dev/sr0 on behalf of uid 1000


$ udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[10728.340800] change   /devices/pci0000:00/0000:00:07.0/0000:03:00.0/ata8/host7/target7:0:0/7:0:0:0/block/sr0 (block)
UDEV  [10740.564937] change   /devices/pci0000:00/0000:00:07.0/0000:03:00.0/ata8/host7/target7:0:0/7:0:0:0/block/sr0 (block)