I see.
What about this for example: "Jan 30 23:58:02 Unraid kernel: Buffer I/O error on dev sda1, logical block 898861, lost async page write
Jan 30 23:58:02 Unraid kernel: Buffer I/O error on dev sda1, logical block 898862, lost async page write
Jan 30 23:58:02 Unraid kernel: Buffer I/O error on dev sda1, logical block 898863, lost async page write
Jan 30 23:58:02 Unraid kernel: Buffer I/O error on dev sda1, logical block 898864, lost async page write
Jan 30 23:58:02 Unraid kernel: Buffer I/O error on dev sda1, logical block 898865, lost async page write"
This looks suspicious.