For the disk issue see here, NVMe issue is unrelated, it dropped offline:
Jan 31 17:46:20 Unraid kernel: nvme nvme0: controller is down; will reset: CSTS=0xffffffff, PCI_STATUS=0x10
Jan 31 17:46:20 Unraid kernel: nvme 0000:06:00.0: enabling device (0000 -> 0002)
Jan 31 17:46:20 Unraid kernel: nvme nvme0: Removing after probe failure status: -19
Look for a BIOS update, this can also help sometimes:
Some NVMe devices have issues with power states on Linux, try this, on the main GUI page click on flash, scroll down to "Syslinux Configuration", make sure it's set to "menu view" (on the top right) and add this to your default boot option, after "append initrd=/bzroot"
nvme_core.default_ps_max_latency_us=0
e.g.:
append initrd=/bzroot nvme_core.default_ps_max_latency_us=0
Reboot and see if it makes a difference.