I've notices that during large writes to the cache pool my write speed quickly tapers from 300 MBps to 30 MBps. I ran across a write speed test from JorgeB on another post that captured what I was seeing in the webui perfectly. Why could I be seeing this?

 

It is a Silicon Power 1TB connected directly to the motherboard SATA controller and TRIM is scheduled to run daily. It is 4KiB-aligned and I've been thinking about reformatting with 1MiB alignment but want to see if there are other options first.

 

kinderserver-diagnostics-20221122-2031.zip

Edited November 23, 20223 yr by skinsvpn

That looks more like a device problem, most SSDs cannot sustain max write speed for long.

Thanks. Is this indicative of a low quality or dying device?

Most likely the former, but could be both.