Should the NAS be restarted regularly? Don't copy the router setup; the real cost isn't the hard drive being in these three places

last week, a friend visited my home and saw that the router in the weak current box automatically restarts at 4 a.m. every Wednesday. Afterwards, I set a weekly reset for my four-bay Synology unit as well. After setting it up in the third week, he asked me: Why does every time I reboot, the seeds in qBittorrent have to spin in circles for ages, and the album index task runs all over again? After hearing this, I could say one thing—the maintenance logic for routers really can't be directly applied to NAS. This article will break down the score and settle the score.

correct a misconception: a scheduled restart doesn't damage the hard drive at all

many people restart when NAS is not set up, citing "frequent motor start-stop damage the hard drive." This sounds reasonable, but in reality, it doesn't hold up to being counted. Looking through hard drive specifications, mechanical drives generally have a Start/Stop Cycle rated at 50,000 times, NAS drives have a headload and unload rate of 600,000 times, and desktop disks have 300,000 cycles. These are the numbers stated in Western Digital's white paper, not merchant slogans.

reboot once a week at a scheduled time, that's 52 shutdowns plus 52 start-ups a year, so at most 104 times. A quota of 50,000 times is enough to keep going through this for over four hundred years. So the reason for "damaged drives" can be set aside—the real reasons NAS drives fail are bad circuits, aging read/write heads, or weak power connections. These were written in the article about Signs of Broken Drives, and they basically have nothing to do with the planned start-stop routine of dozens of times a year.

on the other hand, be cautious: low start-stop losses on hard drives don't mean "power out" comes without cost. If the drive loses power halfway through writing, the file system must rely on log rollback to save the situation, which in extreme cases could put the entire pool at risk. I'll explain this in detail later.

Why should

routers be restarted, and why not use NASs

my old AC2100 does reboot once a week. After over 900 hours of play, the 5G slows down, but the effect is immediate once restarted. The root of the router's problem lies in its hardware conditions: over 100 megabytes of memory, it has to support NAT session tables, DHCP lease tables, and a bunch of state machines. On the night you connect to BT, the session table is completely full, and all new connections are lost. This kind of resource-accumulation lag is the only solution for home users. The specific cost is calculated in the NAT session table article. Therefore, regularly restarting the router is proper maintenance. I have written specifically about how to set up five brands; see article on the router scheduled restart settings .

NAS is another resource model. My N100 mini PC has 8GB of RAM, and Feiniu system has run for over 200 days. At a free -h glance, usable memory stays around 40% year-round. When the kernel is tight, it recycles cache and uses swaps, so no need to cut off power to clear memory. Linux servers running for hundreds of days is the industry norm, which is completely different from the Windows era of "rebooting cures all problems" experience.

the more critical difference lies here: when the router restarts, the whole family is offline for thirty seconds, and IoT devices reconnect and that's it; Once the NAS restarts, all running operations stop. This is the real cost; let's count them one by one.

rebooting your NAS once, what exactly are you losing

first point: seeding and downloading must be reconciled. For a normal soft reboot, qBittorrent will write the progress in the fastresume section, so after starting up, you can resume the status yourself, with little cost. But if it's an abnormal interruption like a power outage, you have to perform integrity checks on the seeds—I have 230 seeds, and checking them means reading the download disk from start to finish. The hundreds of gigabytes of the disk take a couple of hours to read, and during this time, the disk is fully loaded and can't get other tasks into the queue. The complete history of seed farming is in the article about NAS download .

Second, the timed quest is completely ruined. My backup task was done early Friday morning. rsync pushed the new photos onto my mom's old Synology machine. This window was deliberately chosen to avoid the router's Wednesday restart—a rule I set after making a mistake when scheduling tasks back then. If you casually set the NAS restart on the backup window, it's like personally breaking your own backup chain once a week, and even if it fails, no errors appear—it's the most frustrating part. The complete setup for off-site synchronization is the article two NAS off-site backups.

third, the restarted service needs to be "warmed up." From pressing reboot to fully service-ready, my N100 took over three minutes in actual testing: the system took one and a half minutes, then a dozen or so Docker containers were pulled up one by one for another and another minute. Album indexes and Jellyfin media library scans still needed a while before returning to normal response speed. If you've installed surveillance, you need to be even more aware — the surveillance kit runs on the NAS, and the reboot minutes of recording have a gap. When you want to adjust that period, you'll only see a black segment. Camera addition and recording screening are NAS in the video about the surveillance recorder. Backing up clients on computers is even more direct—tools like Time Machine recognize continuity. When the NAS goes offline for a few minutes, the client just silently retries and leaves a failure record, making troubleshooting a waste of time.

When will

really be restarted

is not set, but that doesn't mean it never restarts. When these three signals appear, restart when necessary—don't force it.

system update is the most legitimate reason. After installing minor security patches, restart if needed. Don't be like me, dragging it out for three months—that journey is in NAS system update article. Don't rush to restart the memory issue; it's probably a leaked container. If you sort the memory tabs in Docker, chances are you'll find the culprit. If you really can't tell how to allocate memory, refer to the three-level test from NAS Memory Upgrade . Commands like free -h require SSH to be enabled first, and the entry point is SSH NAS.

you really want to reboot, do it in this order

order follows one principle: let the writing work stop first. Step one: pause all tasks in qBittorrent, wait a minute or two for it to load the data onto the platform; Step two: glance at the task schedule to make sure you haven't hit the backup window or index task, and also check the list of stolen drives from the hard drive sleep check to have a clear idea. Step three: Restart the webpage backend point to allow it to gracefully stop the service.

unplugging is the bottom of the cabinet, and you must turn off the device before unplugging. Having a UPS at home makes things much more respectable. After the mains power goes off, it can hold the NAS to shut down service and then safely shut down. I wrote about this setup in the NAS UPS article, and I still remember the lesson of that night when the RAID rebuilt to 62% trip.

there's another pitfall that's especially easy to overlook: the restart strategy for Docker containers. If the policy is not set to always or unless-stopped when installing containers, after the NAS reboots, the container will not revive itself and will have to manually tap each point. Several friends' Jellyfin disappeared after rebooting, and this is very likely the reason. When loading the container, I glanced at this setting again—it's much more convenient than manually putting out fires every time I restart later.

just copy the homework according to the numbers

Sequence: Turn off the idea of scheduled restart and let it run normally; When restarting, stop farming, avoid backup windows, and restart softly; Before unplugging the power, turn off the device; if you have a UPS, rely on the UPS. Restarting the router weekly is maintenance, and the ONT losing power every day is a loss. That cost is calculated in the the ONT should be restarted regularly; NAS restarts from time to time aren't lazy either—three types of devices, three different logics, and for me, this comparison is no exception.