i had replace 3 new 4TB hard disk for video storage( in 6 months) on the same NVR same drive with the same test error code,. The NVR is attached with online UPS and in air conditioned room 24/7.
Wonder is there a defect on particular batch of hard disk?
Same issue here, Got to RMA the first one couple of months back, the second one died last week and I just got a replacement for the second 4TB drive and I get to find out the replacement from the other unit has died as well. What’s going on??