Observint N4 User Manual page 57

Record on ESATA: This menu available when your recorder includes an e-SATA port on the rear panel. It will allow to
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record the video to an external e-SATA HDD in addition to an internal HDD(s). If e-SATA recording is enabled, the e-SATA
backup function will also be disabled.
If the recorder supports multiple HDDs, an edit icon will appear on the menu. Click the icon to open the following menu.
To use the HDD menu:
1. Open the HDD ID drop down list and select the HDD you want to configure.
2. Open the Disk Type drop down list and select the attribute you want to apply to the HDD. Disk Type options are Read-write
(default), read-only, and redundant.
Set the HDD to Read-only mode to prevent new recordings from being written to the device. You can still search for and
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play recording on a read-only HDD.
A Redundant HDD can be used to automatically backup recordings on (read-write) HDD. When a redundant HDD is
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designated, the system can be configured to record cameras in parallel to both the read-write HDD and the redundant
HDD. This feature is useful for protecting data when an HDD failure occurs.
3. Open the Disk Group drop down list and select the Disk Group you want to assign to the HDD. The disk group feature can be
used to balance recordings across multiple HDDs by assigning cameras to different disk groups.
SECTION 7: DEVICE CONFIGURATION
N4, N8, N16, N32 NVR V8.1.0 User Manual 51