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REFERENCE APPENDIX
247securityinc.com | 1.866.693.7492 | 1455 Alderman Drive, Alpharetta GA 30005, USA
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Reference Appendix
This section includes “
nice-to-know
” information and technical details that will help you fully
understand the Zeus TITAN.
THE DHD (DUAL-STAGE HYBRID DRIVE) MEDIA
The Dual-Stage Hybrid Drive (DHD or DHD2) has
been specifically designed by 247 Security Inc to
accommodate the rigors of the road that vehicles
experience. Regular mechanical drives are prone
to vibration and bumps, and SSD drives are not
as robust as mechanical drives regarding frequent
read/write routines. The Zeus TITAN and DHD
media address these issues. Here’s a brief
description of how it works.
Inside a DHD are two disks: a SSD (solid state drive)
and a HDD (hard disk drive, a mechanical spinning
disk). The SSD is formatted in FAT32, and the HDD
is formatted in EXT3. DHD and DHD2 are available
in 1 or 2 terabyte sizes.
For DHD recording, Enable DHD Recording must be
selected on the System configuration menu.
See page 18 for details.
DHD Recording Process
The cameras are only recorded on to the SSD part of the DHD; once the vehicle has stopped, the
content begins to transfer to the HDD part of the drive. That’s why the POWER and REC lights must
be off before removing the DHD media. Also, during configuration, the Enable DHD Recording field
must be checked, otherwise Zeus Titan will record straight to the SSD part of the DHD storage.
At the boot up stage
When the system boots up, Zeus Titan will do a self-check to make sure all systems are operational.
If DHD recording is enabled, the SSD will be selected as recording disk and the HDD will be powered
off if detected.
If the SSD is corrupted, then the DVR will attempt to recover the SSD for up to 4 minutes. If the SSD
can’t be recovered, it will be formatted (FAT32).