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.

had my synology ds918+ go offline while at a camp and when I came home, it was just off. my desktops were on, modem/router were on (both modem/router and nas are on a PSU, my one desktop that is not was still on, so not a power outage or it would be offline). Tried it on a different outlet, nothing. Pulled drives out, pulled extra ram out, nothing. Tested with multimeter and couldn't get any signal through it. one 2 of the prongs, the continuity test worked, but also noticed the green led light (didn't realize it had one) was off on the brick. Synology support said it was out of warrenty so no help there (not their issue really), so I decided to order one of these to rule that out. Came 2 days later, and when i plugged it in, green light on brick, hooked it into the nas and blue power light came on. Minute later, could connect to it. Not too bad of a fix cost after 4 years of non stop running. Might as well try that if you are getting the same thing with zero power coming, or your power brick is flickering.

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.

failed after 2 years. over this last weekend, my snylogy starts complaining about disk power resets. eventually all the drives were resetting while it was online. looks like it's ability to sustain the current draw is a problem. voltage is drop during busy times while the sinology is attempting to operate. now can't even power on disk 1 and 2 (while disk 3/4 power up). the drives are in a power cycle loop. you can hear them start to spin up, then down. and 10-20 seconds later, retry. almost thought I had a double disk failure. turns out replacing THIS power supply with an official Synology power supply fixed the issue. BEWARE - if your data is important, always back it up somewhere regardless. but also avoid this power supply for the needless restore from backups when it eventually can't handle the current draw.