Hi Trev83. I've same problem with my HIK NVR DS9632NI-I8 and Synology NAS. It shows "abnormal" even create some file on NFS shared folder. Do you have any solution for problem? please share.
I have 02 issues. One issues is one bad hard disk (RAID 5). After replace new HDD it happended everyday. Check log i found a HDD issue. I also upgrade to latest firmware 4.1.7. Not sure which one cause issue. How to check details of hdd issue?