Hikvision DS-9664NI-I8 HDD Issue?

I have a pair of HIKVISION DS-9664NI-I8 NVRs, both with same number of cameras and HDDs. The interface on one of them is very sluggish. It takes an extremely long time to respond to input. I click on an option and it takes up to 20-30 secs to respond. All drives (4 drives on each) on both NVRs are full and are overwiting. At one point I was getting HDD errors for multiple "channels" on the NVR with interface issues. I updated firmware and then the warnings seemed to go away. But laggy interface still persists. I ran the onboard HDD test utilities and all 4 drives passed. My question revolves around adding a new drive or trying to replace a flaky one. I do not have RAID enbaled so is it possible to remove one drive at a time and see if the laggy interface issue clears up? Or am I barking up the wrong tree? I have new drives at my disposal.

A bad drive should not affect the interface. It seems like the nvr's processor is overloaded. Try disconnecting half the cams to test.

fenderman said:

A bad drive should not affect the interface. It seems like the nvr's processor is overloaded. Try disconnecting half the cams to test.

Click to expand...

Great idea, thanks! I assumed since it had about the same number of cams running the same quality as the other NVR we had, that it wasn't processor, but that is excellent suggestion! Is turning down the image quality on the 50 cameras the answer to giving the processor a break? Thanks again for help! This forum has been very useful to me.

i am running 32 cameras to this nvr. so far so good.