Estimated lifespan of SSD M.2 Drive1 in DS923+ on Synology-NAS has dropped to 10%

Hi Everyone,

I saw this today and I’m wondering if I purchased the wrong brand, or type of SSD M.2. Have any of you seen this? This drive is only about 7 months old!

The estimated lifespan of SSD M.2 Drive1 (model: WD Blue SN570 500GB, SN: 22403W804436) in DS923+ on Synology-NAS has dropped to 10%. We strongly recommend backing up the data in this SSD and then replacing it with a new one.

This is the model that I purchased on 1/5/2023…
# Western Digital 500GB WD Blue SN570 NVMe Internal Solid State Drive SSD - Gen3 x4 PCIe 8Gb/s, M.2 2280, Up to 3,500 MB/s - WDS500G3B0C


Thanks in advance!

Also, just noticed my other, identical drive, is at an estimated lifespan of 6%. Grr.

Does the S.M.A.R.T. data in Storage Manager provide any insight into the estimated reduced lifespan? There ought to be something other than OK in one or more of the status indicators.

I’m not familiar with how to read these. I’m attaching an image from Storage Manager.

It’s read-only or read-write cache? SSD have a limited lifespan in Endurance (TBW). WD Blue SN570 500GB TBW is 300, so 300 x 500GB = 150,000GB. Under Storage Manager > Storage Pool > Volume > SSD Cache, what is shown under Cache composition? what’s the Reusable / Total?

Thanks, @Ron_Tan,

Here is what I see.

Maybe it should be only read cache? I have heard @Will talk about that on his videos. Hmm?

Out of 465GB of cache, you have 464.8GB Occupied that’s why you get the warning.
according to synology, the recommended cache size (especially for read-write cache) to be 2 to 2.5% of the volume size. so with your volume of 47.2TB it is recommended to have about 1tb of cache to be safe (I just round to the nearest 1 or available SSD size).
But even if it’s read-only cache it never hurt to have more, since running the SSD between 25% to 70% capacity fetches better performance out from nvme m.2 ssd from what I read.
Either way unless you are very confident that you won’t suddenly get a power outage or you don’t mind loses all those data on the SSD not yet written onto the volume, personally i will just stick to read-only cache + under Storage Manager > HDD/SDD configure all the HDD and SDD turning off enable write cache.

Now back to your problem, solution 1 would be temporary stops all activity on the NAS and let the NAS have some resting time to write all those data from the SSD to the volumes and see if the warning goes away. Or solution 2 would be click remove cache under Storage Pool > Volume > SSD cache > 3 dot to force the NAS dumb all the data on the SSD onto the volume immediately (it will take some time like 15min to 1hr). Only then you can tell if it’s the problem with the SSD by testing it on your computer or it’s just too much activity for your NAS to have time to move the data.

Hmmmm, I dont think that you would actually be able to write enough data into the drive in the time that you have had it to actually get the SSD worn down. I am not sure about the TBW as I dont know the actual units.

I would guess DSM is interpreting the results incorrectly

I have a pair of optane 110gb drives in my 923 this is what they look like: