Extremely high disk use

[c0mm4nd]

Version: built docker container with commit e563459
Disk: HDD
Docker:

version: "3"

services:
  btcd:
    container_name: btcd
    hostname: btcd
    image: btcd:latest
    restart: unless-stopped
    volumes:
      - /mnt/hdd14t/btcd:/root/.btcd
    ports:
      - 18333:8333
      - 8334:8334
    command:
      - --txindex
      - --addrindex
      - --blocksonly
      - --rpclisten=:8334
      - --rpccert=/root/.btcd/rpc.cert
      - --rpckey=/root/.btcd/rpc.key
      - -u=btcd
      - -P=pass

Problem: always high disk write (>30MB
Realtime:

Accumulated:

This is abnormal, the writing rate and volumn is even more than an ethereum archive node.

ADD:
The data was fully-synced in SSD before moving to HDD, so the writing thing wont be initial syncing.
I didnt notice whether the problem had occured on SSD.