High hdd usage many unexpected EOF

[Alexey]

Is it a SMR disk?

PSA: Beware of HDD manufacturers submarining SMR technology in HDD's without any public mention

Recently there have been several reports of SNOs running into massive CPU wait issues. It seems the common thread has been the use of HDD’s in which manufacturers have quietly started using SMR technology. [2003549104] Because of these overlapping tracks, when data is written to the disk, the drive has to rewrite several additional tracks. This obviously leads to much slower writes. These HDD’s usually deal with that using large caches and rewriting the shingles tracks during quiet times. How…

What’s filesystem, how much RAM, what’s OS?