No, it was a pretty complete ban. From a reputable reviewer[0]:
> New Installations Blocked for Non-Verified Drives
> As discussed in our NASCompares coverage and testing videos, attempting to initialise the DS925+ with hard drives that are not on the 2025 series compatibility list will block you from even starting DSM installation.
and
> Expanding Existing Storage Pools with Unverified Drives is Blocked
> Another key limitation to note is that you cannot expand an existing storage pool using unverified drives — even if your system was initialized using fully supported drives.
and
> To test RAID recovery, one of the three IronWolf drives in the migrated SHR array was removed, placing the system into a degraded state. We then inserted a fresh 4TB Seagate IronWolf drive.
> Result: DSM detected the new drive but refused to initiate RAID rebuild, citing unsupported media.
You could pull all of your drives from an older Synology and put them in the new device, but you couldn't add drives to the volume or replace crashed drives. And if you were starting with a brand new NAS, you couldn't even initialize it when using 3rd party drives.
I'm OK with a warning notice. I'm not even remotely OK with this.
By the way, their official drive compatibility list for the DS923+[1] shows dozens of supported 3rd-party drives. The same guide for the DS925+[2], an incremental hardware update, shows 0. So if you bought a bunch of drives off their official support list, they're useless in newer models. Apparently a Seagate IronWolf was perfectly fine in 2023 and a complete dud in 2025.
Oh, and Synology only sells HDDs up to 16TB in size[3], and they only have up to 12TB drives (for $270) in stock today. That price will get you a 16TB IronWolf Pro off Amazon. If you have cash to spend, you can buy a 28TB IronWolf Pro there, which is 2.3x bigger than the largest Synology you can order from the first-party store today.
> New Installations Blocked for Non-Verified Drives
> As discussed in our NASCompares coverage and testing videos, attempting to initialise the DS925+ with hard drives that are not on the 2025 series compatibility list will block you from even starting DSM installation.
and
> Expanding Existing Storage Pools with Unverified Drives is Blocked
> Another key limitation to note is that you cannot expand an existing storage pool using unverified drives — even if your system was initialized using fully supported drives.
and
> To test RAID recovery, one of the three IronWolf drives in the migrated SHR array was removed, placing the system into a degraded state. We then inserted a fresh 4TB Seagate IronWolf drive.
> Result: DSM detected the new drive but refused to initiate RAID rebuild, citing unsupported media.
You could pull all of your drives from an older Synology and put them in the new device, but you couldn't add drives to the volume or replace crashed drives. And if you were starting with a brand new NAS, you couldn't even initialize it when using 3rd party drives.
I'm OK with a warning notice. I'm not even remotely OK with this.
By the way, their official drive compatibility list for the DS923+[1] shows dozens of supported 3rd-party drives. The same guide for the DS925+[2], an incremental hardware update, shows 0. So if you bought a bunch of drives off their official support list, they're useless in newer models. Apparently a Seagate IronWolf was perfectly fine in 2023 and a complete dud in 2025.
Oh, and Synology only sells HDDs up to 16TB in size[3], and they only have up to 12TB drives (for $270) in stock today. That price will get you a 16TB IronWolf Pro off Amazon. If you have cash to spend, you can buy a 28TB IronWolf Pro there, which is 2.3x bigger than the largest Synology you can order from the first-party store today.
[0] https://nascompares.com/guide/synology-2025-nas-series-3rd-p...
[1] https://www.synology.com/en-us/compatibility?search_by=drive...
[2] https://www.synology.com/en-us/compatibility?search_by=drive...
[3] https://www.synology.com/en-us/products/store#product-storag...