Redundancy HDD must be an independent HDD, user can set several HDDs as a redundancy HDD group.
Once a HDD is assigned as redundancy HDD, the recording data can be saved in both normal HDD and
redundancy HDD.
Data on redundancy HDD should be automatically cycle coverage, cycle period depends on the recording
data and redundant HDD’s capacity.
Note: Make sure 2pcs HDD at least in DVR, one for read and write, another for redundancy.
Channel redundancy configuration
User can choose part channels or all channels to set redundancy backup. Please get to
【
Configuration
】
→
【
Record
】
, choose redundancy channel, check mark
【
Redundancy
】
.
Note: the data in channel turn off redundancy only is recorded in normal reading and writing HDD if
the redundancy is not enabled.
Retrieve HDD redundancy
User can retrieve backup recording data from redundancy HDD when RW HDD damage or data lost.
Firstly, shut down DVR and remove damaged HDD, then restart DVR;
Secondly, Get into
【
Main menu
】
→
【
Storage
】
, set redundancy HDD as a reading and writing HDD, then
it can be searched.
6.7 HDD S.M.A.R.T
S.M.A.R.T: “Self-Monitoring, Analysis and Reporting Technology”
S.M.A.R.T HDD can analysis head, disc, motor, circuit operation, history and default security values via
monitor instruction in HDD and surveillance software in host. Alarm will be sent to user automatically
when the value is outside the scope of the security situation.
Detection parameters of Seagate HDD for example are divided into seven: ID detection code, Attribute
Description, Threshold, Attribute Value, Worst, Date, and Status.
1
、
ID detection code
ID detection code is not the only; manufacturer can use different ID code or increase or decrease its
quantity according to the detected parameter’s quantity.
For example: the ID detection code of WEASTERN DIGITAL’s product is “04”, parameter is Start/Stop
Count, but the parameter of same code in Fujitsu’s product is “Number of times the spindle motor is
activated”.
2
、
Attribute Description
Attribute Description: name of detection item. Manufacturer can increase or decrease
。
As ATA standard
update constantly, sometimes different models in same brand maybe different ,but must ensure major test
items specified in S.M.A.R.T .(although different manufacturers have specific naming convention ,the
essence of monitoring is the same.)
1 Read Error Rate
2 Spin up Time
4 Start/Stop Count
5 Relocated Sector Count
7 Seek Error Rate
