Vivotek ND9542P 32-Channel 4K UHD NVR (No HDD) - Manual (Page 157)

VIVOTEK - Built with Reliability
User's Manual - 157
Attribute : The various attributes can vary from different HDD manufacturers.
Value : Value for the currently selected attribute.
Worst : Worst value acquired for that attribute.
Threshold : A predefined threshold or triggering value. The threshold below which the
normalized value will be considered exceeding specifications.
Raw value : The detected parameters for that attribute.
Status : The judgement made to deem the current reading as OK or failed.
Verify:
Three types of check disk actions can be initiated through this button.
Bad block check : Performs read/write test to drive sectors to locate bad blocks. This action
may take several hours to complete.
Fast S.M.A.R.T. test : Tests the electronic and mechanical performance and disk read
performance, including those on disk buffer, read head, seek time, and integrity of drive
sectors. The short test is performed on a small section of disk platters, and takes about 2
minutes to complete.
S.M.A.R.T. long test : The long test is more thoroughly and is performed to all drive sectors.
The actual completion time depends on drive sizes and the attributes put to test.
The Check disk functions mentioned above, when performed during active I/Os, can consume
system resources and cause dropped frames with the recording tasks.
Note that disk verify function
requires a volume to be temporarily
disabled; namely, the video
recording will be stopped before
disk verify can be performed.