29
REMOVABLE HARD DRIVE
The removable hard drive can be loaded with up to 2 IDE 2.5” hard drives
or 1 SATA 2.5” hard drive. The DVR treats all hard drive memory as a
large storage area but the Advanced Setup menu offers disk specific
operations (erase, format). Configuring the removable drive with 2 drives
provides some redundancy but since data is stored in one file during
capture, the loss of a drive will remove half the onboard storage and data.
FILE STRUCTURE
In the root directory of the Hard Drive, the DVR will create a new
subdirectory for each day of recording. The subdirectory is named as
follows:
Mmm.dd.yyyy
•
Mmm - 3 letter month abbreviation, e.g. Jan, Feb, Mar,…Dec
•
dd - day (01 - 31)
•
yyyy - 4 digit year, e.g. 2006
Each subdirectory will contain a fileset of one or more AVI files that are
grouped by file name. In order to minimize the effect of a forced
shutdown where any open files may be lost the DVR periodically closes
the file record and opens a new one. In addition, to help navigate records
for events the DVR closes the current file and opens a new one each time
an event is triggered, so triggered events can be found and viewed easily.
The file naming convention is as follows:
Mmm.dd.yyyy_hh.mm.ss [#] –[seq].avi
•
Mmm.dd.yyyy - same as directory name
•
hh.mm.ss - 24 hour time in hours, minutes, and seconds when
this fileset began recording. This is the local time, so if a GPS is
used to obtain UTC time, this filename will be the UTC plus the
timezone offset.
•
‘#’ – Marks a file that was initiated due to an ‘event’ of interest as
defined by the trigger condition of MARK..
•
-[seq] – sequence number of file in the fileset. Sequence
numbers start with ‘-001’ and increment from there, however if the
DVR is in continuous record mode, where the oldest files are
overwritten, sequence number ‘-001’ may be deleted. Therefore
the lowest sequence number is the beginning of the available
acquisition.
•
avi - AVI file extension
EXAMPLE:
Found in the C\ Mar.12.2008 directory:
