Macvlan call traces are usually the result of having dockers with a custom IP address, upgrading to v6.10 and switching to ipvlan
might fix it, or more info below.
https://forums.unraid.net/topic/70529-650-call-traces-when-assigning-ip-address-to-docker-containers/
See also here:
https://forums.unraid.net/bug-reports/stable-releases/690691-kernel-panic-due-to-netfilter-nf_nat_setup_info-docker-static-ip-macvlan-r1356/
There are multiple ATA errors for cache2, and it's logged as a device problem, so you should keep an eye on that:
Sep 12 00:37:48 NAS kernel: res 51/40:20:40:2e:3d/00:00:12:00:00/e0 Emask 0x9 (media error)
Sep 12 00:37:48 NAS kernel: ata6.00: status: { DRDY ERR }
Sep 12 00:37:48 NAS kernel: ata6.00: error: { UNC }
Sep 12 00:37:48 NAS kernel: ata6.00: configured for UDMA/133
Sep 12 00:37:48 NAS kernel: sd 6:0:0:0: [sdf] tag#30 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x08 cmd_age=0s
Sep 12 00:37:48 NAS kernel: sd 6:0:0:0: [sdf] tag#30 Sense Key : 0x3 [current]
Sep 12 00:37:48 NAS kernel: sd 6:0:0:0: [sdf] tag#30 ASC=0x11 ASCQ=0x4
Sep 12 00:37:48 NAS kernel: sd 6:0:0:0: [sdf] tag#30 CDB: opcode=0x28 28 00 12 3d 2e 40 00 00 20 00
VMs pausing is usually when they run out of space, and your cache pool is completely full, that's also what is causing issues with libvirt.img, it might recover after you free up some space on cache and reboot.
Unless you care about snapshots and/or checksums xfs is the best option for the typical user, to change you need to backup/move the data from each disk and re-format, it can be done one at a time.
It's not possible, Unraid requires one partition using the entire device, it might work if you change to a pool, and you can have a single device pool, just need pool slots set to >1, pools require btrfs.
Forgot to mention, you have other disks with HPA enable, but don't remove it on those or Unraid will also complain the disks are wrong, but now because they are larger than they should be, only remove on disk3 and disable that feature on the board BIOS so more are not created.
Sep 16 20:26:05 Tower kernel: ata3.01: HPA detected: current 5860531055, native 5860533168
Sep 16 20:26:05 Tower kernel: ata3.01: ATA-9: WDC WD30EFRX-68EUZN0, WD-WCC4N6VXN8P2, 82.00A82, max UDMA/133
Your board is creating these:
Also change SATA controller from IDE to AHCI/RAID.