What does it mean when a NAS keeps beeping at midnight? My cousin's Synogene sounded all night, and in human language, it was four kinds of illnesses

at 1:40 a.m. last Wednesday, my cousin sent a fourteen-second recording: the four-seat Synology in his study made two "beeps, beeps" every few seconds—not loud, but eerily rhythmic. His first reaction was to reach out to unplug the power, but I pressed him down with a single 'Don't move.' The machine kept blaring all night. The next morning, I logged in remotely and checked everything in ten minutes. This article explains everything that happened that night, combined with the 'bird language' of the buzzer, all at once.
listen carefully: is it the horn or the disc ringing
NAS three places where sound will come out, first sorting the sound sources correctly so the direction won't be wrong.
buzzer is a tiny speaker on the motherboard, about the size of a fingernail, producing a crisp, rhythmic electronic sound that radiates from the entire body, regardless of side. It speaks of system-level problems, with the backend fully able to find the cause—it's a case of 'speaking when there's something to say.'
hard drive noises are a completely different matter: clicking mechanical sounds coming from a specific drive slot, muffled and irregular. That was the pan calling for help, most likely the magnetic head. I wrote about the previous post about the hard drive breaking, heard this kind of noise and the first thing to do was to cut off the power, not to troubleshoot.
not sure which one it is, here's a simple trick: bring your phone close to the body to record a clip, then listen to it close to your ear during playback. Electronic and mechanical sounds are very separated in the recording—the former is like a watch reminding you, the latter like someone knocking on the table. If you're still unsure, just circle the camera body and listen; the sound follows a certain dial position—that's the disc.
there's a third type: the fan hums louder and feels stuffy. That's not called alarm, it's aging. The NAS noise article dedicated to it. The cousin's recording was a standard electronic beep, setting the direction: the system was speaking, not breathing.
beep sounds in human language, there are four types of illnesses
the original article from Synology's official knowledge base, "My Synology NAS Keeps Beeping," I translated the original text, plus the original line from the DS1823xs+ product manual—"If the fan malfunctions, the Synology NAS will beep"—the causes of the persistent beeping are as follows:
| which type of fault | typical trigger | where to check |
| storage pool/volume downgrade | hard drive failure, bad sectors, disk ejection, power outage interrupting rebuild | the memory manager to see which drive is lagging |
| fan failure | dust stuck and can't turn, bearings up to age | close to the body to listen for speed, or check the fan status in hardware info |
| the temperature is too high | the cooling vents are blocked by dust, and the environment is too hot | check the hard drive temperature in the storage manager |
| SSD cache exceptions | cache disk disconnects or is corrupted | check cache entries in the storage manager |
confirm the actions are unified: log into DSM, tap the notification center in the top right corner, and take a look. It usually writes human language directly. My cousin's notice was just one line—Storage Pool 1 had been downgraded.
cousin's noise that night was found to be due to contact disorder
the next morning, I had him take photos and then remotely access the backend. In Storage Manager, drive 2 is empty and shows 'Not Installed'; The pool is downgraded, but the competition is still ongoing—his two pieces from the 4T Cool Wolf team's RAID1 are still holding up. That's the meaning of mirroring. RAID pick which post calculate the score.
disconnection does not mean the disk is broken. He had to follow the old process the hard drive couldn't be recognized: normally shut down, remove drive 2, check the contacts and clips, and plug everything back in. Filming started, and the inventory was back in the field. Review SMART again— check the rules in SMART's compared to normalization values and passing lines. Don't be scared by the astronomical numbers in the RAW column—Pending sector zero, everything is above the passing line. It's not a broken disc, it's loose contact. Early morning is when backup tasks are intense, and machine vibrations combined with aging contacts cause disconnections.
Next, click "Repair" in the storage manager, select drive 2, and start the RAID1 image rebuild. 4T vs 4T full drive copy, eight or nine hours. During these eight or nine hours, there are two rules: don't cut the power, and if it does, start over again to damage the disk; Don't cram in new data; the rebuilding phase is already busy.
during rebuild, you have to keep track of the machine's performance: the green lights on both drives flashed wildly, SMB copy speed dropped to half normal, and the fan spun more frequently than usual—all normal. It was performing a full disk copy, so don't treat it as a secondary fault and reboot. My cousin was so flickering that afternoon that he almost asked me again.
if SMART really gets a red card, then there's another path: first consider whether the backup is still available (the 3-2-1 ), then think about the opening money ( the data recovery article quoted price); the sound itself can't save the data.
hard drive light color is easier to recognize than a beep
beep is for the ears, the light is for the eyes; looking at each other is the fastest.
| which light | what status | what it means |
| the hard drive light | flashes green | Normal reading and writing. Midnight flashing is mostly a backup or running a backup drive, not a faulty |
| hard drive light | red or orange | faulty, downgraded, or rebuilding — all three should be checked in the background |
| status light | flashing blue | in startup or system update, waiting for it to stabilize |
| power light | blue always on | power supply is normal |
| power light | always flashing | couldn't get up. Official statement: the light stays on but beeps within three minutes, and the motherboard is still alive. The problem is mostly with the hard drive, peripherals, or power adapter |
That night,
cousin actually had a sign: the light at seat 2 went out, and the warning light above the seat turned orange. He didn't see it, because the machine was tucked under the desk, with the lamp facing the wall. This is a lesson: when positioning NAS, leave an angle where you can see the lights. NAS where is the best place to put it? I've calculated the noise dissipation and heat and electricity costs, so here's another lamp addition.
Can you turn off the beeping? I can, but I advise you to keep a
is not long: control panel → hardware and power supply→ standard → beep control, select silent, and keep the world quiet. For DSM 6.2 and earlier versions, this option is called "Stop Beeping," and the position remains the same.
I advise you not to mute everything. Beep is the last free insurance for NAS: phone notifications will be swallowed by the system and drowned out by message streams, but speakers won't. The device is placed in a weak current box and can't be heard, so the push notifications must be properly matched. the article about the phone warning the full setup method; If you can hear it, just turn off polite noises like the power-on prompt, and keep the fault alarm.
Shun gives a twist: a 'beep' isn't all a sign of a death. In the mobile app, there's a 'Find Me' option—tap the NAS and it beeps, making it especially useful when searching the room for devices; The RESET port also counts by beeps. administrator password forgot the reset process in that , hearing a few sounds and when to release are all officially designed signals. He's a chatterbox, not just shouting for help.
Why doesn't the
Feiniu one make noise? And three preventive measures
my N100 Feiniu hasn't made a sound since I got it. It's not that it's physically healthy; it's just that these system machines don't have a buzzer in their body at all, so they rely entirely on software notifications when needed. Therefore, Feiniu users must have their alerts fully equipped; otherwise, if the stock is sold for three days without anyone knowing, the warning approach still applies to Feiniu. If you want to take a quick look, that's fine. Storage management includes disk status and temperature. If you're unsure, just click in and scan it—it's like being your own buzzer.
three things to prevent are better than understanding birdsong after an incident: First, check SMART once every quarter—the trend is scarier than a single reading; Second, clean the dust once a year. The dust from the fan and cooling vents is the primary cause of "overheating" and "fan malfunction" beeps; Third, backup is always more important than alarms. RAID1 can't withstand two failures at once. If it really comes to that, beeps won't save the data—backup is the priority.
follow the following steps after hearing the beep: first identify the sound source→ immediately cut off power and send it for repair when the buzzer beeps→, log into the background to check notifications→ confirm downgrade, back up before clicking repair→ and keep the power supply in rebuild. The most valuable sentence in the whole matter: 'Hibiki' means it's still alive and wants to talk to you; If one day there is no sound or lights at all, that will be the real problem.
