[巴法络] transmission下载速度会影响nas，导致死机吗？

我nas是ls wvl，transmission下载是有4mb/s，最近每次下原盘的时候老是在下载近2个小时后，nas死机。
nas能ping通，但是无法登入，只有拔电源。请帮忙看看问题在哪里。
我现在分析下来是不是因为下载导致transmission在nas中cpu占有率高，导致死机？我的transmission设置如下：

{
    "alt-speed-down": 2500,
    "alt-speed-enabled": false,
    "alt-speed-time-begin": 1140,
    "alt-speed-time-day": 127,
    "alt-speed-time-enabled": true,
    "alt-speed-time-end": 1380,
    "alt-speed-up": 70,
    "bind-address-ipv4": "0.0.0.0",
    "bind-address-ipv6": "::",
    "blocklist-enabled": false,
    "blocklist-url": "http://www.example.com/blocklist",
    "cache-size-mb": 4,
    "dht-enabled": false,
    "download-dir": "/mnt/disk1/Downloads/PT",
    "download-queue-enabled": true,
    "download-queue-size": 5,
    "encryption": 1,
    "idle-seeding-limit": 30,
    "idle-seeding-limit-enabled": false,
    "incomplete-dir": "/mnt/disk1/Downloads/PT",
    "incomplete-dir-enabled": false,
    "lpd-enabled": false,
    "message-level": 2,
    "peer-congestion-algorithm": "",
    "peer-limit-global": 80,
    "peer-limit-per-torrent": 30,
    "peer-port": 51413,
    "peer-port-random-high": 65535,
    "peer-port-random-low": 49152,
    "peer-port-random-on-start": false,
    "peer-socket-tos": "default",
    "pex-enabled": false,
    "port-forwarding-enabled": false,
    "preallocation": 1,
    "prefetch-enabled": 1,
    "queue-stalled-enabled": true,
    "queue-stalled-minutes": 30,
    "ratio-limit": 2,
    "ratio-limit-enabled": false,
    "rename-partial-files": true,
    "rpc-authentication-required": false,
    "rpc-bind-address": "0.0.0.0",
    "rpc-enabled": true,
    "rpc-password": "{3c1dd78ca821eea6c71fcb2835861f8170a90f84q6UsZFYS",
    "rpc-port": 9091,
    "rpc-url": "/transmission/",
    "rpc-username": "",
    "rpc-whitelist": "*.*.*.*",
    "rpc-whitelist-enabled": true,
    "scrape-paused-torrents-enabled": true,
    "script-torrent-done-enabled": false,
    "script-torrent-done-filename": "",
    "seed-queue-enabled": false,
    "seed-queue-size": 10,
    "speed-limit-down": 100,
    "speed-limit-down-enabled": false,
    "speed-limit-up": 100,
    "speed-limit-up-enabled": false,
    "start-added-torrents": true,
    "trash-original-torrent-files": false,
    "umask": 0,
    "upload-slots-per-torrent": 14,
    "utp-enabled": true
}