Interlogix NVR 20 User Manual - Manual (Page 62)

56 TruVision NVR 20 User Manual
each group to the maximum allowed by the device. This allows for specialized
recording behaviors as detailed below.
Normal HDD Recording
This is the default configuration for storage on the TVN 20. All recorded video is
stored on a first-in, first-out basis and all drives record video sequentially on the
drives. It is important to note that all cameras are stored for the same number of
days regardless of the data rate configured for the cameras.
Redundant Camera Recording
This is a specialized configuration of the hard drives and utilizes the creation of
an additional Hard Drive Group. Unlike typical redundancy that duplicates data
on the hard drive, the TVN 20 provides camera specific redundancy. In this
case, the user defines the specific cameras where the need is to duplicate
recording on independent hard drive groups. For example: the system has 16
cameras, but 5 cameras it is desired to provide redundant recording – recording
for these specific 5 cameras is duplicated on different Hard Drive Groups.
Independent Hard Drive Groups
Another specialized configuration of the hard drives supported by the TVN 20 is
completely independent hard drive groups. In this instance, for example, in a 16
camera unit:
• Cameras 1-10 are in a hard drive group 1 (HDD Group 1)
• Cameras 11-16 are in hard drive group 2 (HDD Group 2)
Cameras 1-10, for example, only require 14 day storage. However, Cameras 11-
16 require 30 days storage. By sizing the number of hard drives in each group to
meet the desired storage duration the user can easily meet the recording
objective.
Normal Recording Steps
The default setting for the unit is with all available hard drives configured in a
single group shared by all connected cameras. No additional action is needed by
the User.
Understanding the HDD Settings options:
Field Title Description
HDD No.
The row identifies the capabilities, status and options for this specific hard
drive
Capacity (MB) Shows the capacity of the hard drive