It’s QNAP’s additions to libc. It really should not have been placed there. It should have been placed differently in the filesystem layer. I suspect it’s part of their Q-Tier system (which I do not use)
It looks like Plex because PMS calls into libc() to do I/O.
In QNAP’s libc(), it routes through and into their vjbod handler to deal with your configuration, which is where it faults.
Im currently disabling the SSD cache at present, so itll take a few hours to flush the cache out being 2.7TB, once done ill reboot and check that diag log again.
not sure if it would be relevant to this or not, but wondering if this could be the cause of a kworker process always using about 10 to 15% cpu time. Ive had this issue for many months though. On a reboot it, its normal, then about an hour later, it starts and never settles untill a reboot, then the cycle starts over again.
so im just thinking if theres something matching up here somewhere, considering the kworker is a kernel process