HDDScan results advice

Hi
I just purchased 2 WD Blue HDD, 3 TB each for cold storage (will fill them up with video files and remove from PC). After those HDDs are full, I doubt that I would change much later, so it would go only for READ operation, no more WRITES.

So I decided to scan them, first with Sentinel (short and extended self mechanical tests, and next WRITE surface test) and lastly, HDDScan READ test. Sentinel pass both drives, no errors.

Here are the results of HDDScan

Open Disk 1
Test : RD-Read


Executing
Block start at 0 time 568ms
Block start at 858150400 time 85ms
Block start at 1966501376 time 89ms
Block start at 4662886144 time 123ms
Block start at 5163816704 time 60ms
Block start at 5333855744 time 97ms


Open Disk 2
Test : RD-Read


Executing
Block start at 8960 time 523ms
Block start at 1110373888 time 99ms
Block start at 2171234048 time 98ms
Block start at 3138621440 time 95ms
Block start at 4594897152 time 110ms
Block start at 5389350656 time 104ms


So, what should I do, exchange and hope that others would be better, or for my purpose those will do?

Thanks in advance.
 
Solution
Those results are still better than with green series but are not good enough for use as system/boot disks. That's about same as I get on my 2TB HDDs and there's no problem with reproduction of any HD video.


Thanks for reassurance, so it would be wise not to trick my luck and use them for videos? I have Samsung 500 GB PRO SSD as my boot and WB 1 TB Black for everything else plus a few WD and HGST NAS HDDs for intermediate work. Those 2 Blue drives are for video long term storage only.