User Manual

14BChapter 15: Storage management
102 TruVision NVR 71 User Manual
2. Select the HDD whose data you want to see. A detail listing of S.M.A.R.T. information is
displayed.
3. If you want to continue to use a HDD when the S.M.A.R.T. test has failed, check the box
Use when the disk has failed to self-evaluate.
4. Click Save to save the settings.
RAID settings
RAID is data storage technology. It combines multiple HDDs into a single logical unit for the
purposes of data redundancy or performance improvement.
Note: RAID settings are only available when using a TVN 71 RAID model (TVN-7101R-xxT).
Data recovery and manual rebuild
You can recover the data when a HDD fails depending on the RAID level.
See Table 4 below for a description of the different RAID levels and data recovery.
Table 4: Data recovery by RAID level
RAID level Number of
HDDs
What it does Recovery in case of a HDD failure
0 Minimum 2 Data is split across two or more
HDDs. Each HDD contains a part of
the data. Multiple HDDs can deal with
simultaneous data writing, which
increases the writing speed.
Replace the failed HDD. The failure
of one disk will result in total data
loss. There is no backup method
available for RAID 0.
1 2 RAID 1 creates an exact copy of a
data set (data mirroring) on two
HDDs. The array will continue to
operate as long as at least one HDD
is operational.
Replace the failed HDD and manually
rebuild.
5 Minimum 3 The parity information is divided over
all HDDs in the array. For every HDD
position, the parity information will be
In a RAID 5 setup, one HDD can fail
but the data will be OK.