TAIFU 4-Pin 12V 8.33A - 9A Power Adapter for Synology Disk Station 4-Bay DS410 DS410j DS411 DS411J DS412 DS412 + DS416 DS418 DS918+ DS923+ DiskStation Network Storage NAS Server 12V DC Power Supply

Well, the other morning I woke up to over 800 email notifications from my 6 year old Synology DS-918+, each one stating "abnormal power" on each different drive. The final E-Mail was that Storage Pool 1 was crashed. And here I thought having a one drive fault tolerance would be good enough to protect 30 years worth of documents, photos, music, and movies. If one fails then I'll just throw a new drive in, rebuild the array, and carry on. How wrong I was. It wasn't until I actually started think about what was actually irreplaceably important out of all that that I started freaking out and had an anxiety/panic attack last night. And then this power brick showed up today. My NAS is currently powered up, accessible, and copying all of the important stuff to both Storage Pool 2 on the DX517 Expansion module as well as to a standalone SATA drive plugged into a different system that I'll store elsewhere. One drive is "crashed" and in read-only mode. Fine, fine. I'll take it out, format it in a different system, replace it, and rebuild the array. The other one has a "System Partition Failed". Ok on that one too...that's a future problem to resolve. All drives report Healthy, so that's another plus...it's just the file system that has a problem. So...this purchase was worth every single penny and saved my sanity. I'm not sure what I'm going to do with all of the stock in Tums that I just purchased though. :D I've also got a new-open-box DS-920+ on the way. I'll throw 4 of my old 8TB drives in it, copy my data to it as well, plop it over at a friend's house, and figure out how to do remote syncing. This will not happen again!

So far so good one month in, ordered Dec 2025.

About 4 years ago, in 2020, I bought a DS420+ to replace my aging 2-bay Synology NAS. One day, I found that it was powered off and I couldn't power it on. In my attempt to troubleshoot it, I decided to give a replacement power supply a shot. This power supply was able to power it on, indicating that the original Synology branded power supply had gone bad after 4 years of flawless operation. If you run into a similar situation where you need a replacement power supply for your Synology NAS, look no further. This appears to be a quality product that works just like the original Synology power supply.

The power adapter on my 918+ died and I thought I needed a new unit but from other people online I saw replacing the ac adapter fixed the issues in a lot of cases and saved me a big headache.

Purchased this on 05/06/2024, and it died on 02/02/2026, connected to my Synology DS918+ NAS, and lost a WD Red Pro 10TB drive because of it. Thankfully, I'm running RAID5 and can swap in a new drive, but now I'm out $250+ for a new drive thanks to this thing failing. The power failure caused 2 drives to have issues (one entering Critical condition and another needing me to Repair System Partition). Thankfully, I saved one of the drives, but the other is dead in the water. I use a heavy-duty backup battery 600VA UPS, which was connected to as well, so it's not like there was a surge or power failure that caused anything else to happen. My recommendation: Buy a better brand and/or OEM external power supply for your NAS if the OEM dies.