My Synology NAS is slowly dying. I also have an UnRAID machine and I’d like to explore whether it’s possible to move the hard drives from the Synology NAS into the UnRAID server.

The main question is: will the data on those drives still be valid and accessible, or would I risk corrupting the files by transferring them this way?

I have a lot of photos, videos, documents, and other important files on the Synology that I don’t want to lose. I could copy everything to separate HDDs first and then move them into the UnRAID server, but if I can avoid that extra step, I’d prefer it.

Has anyone here done this before?
Are there tutorials (video or written) that explain the process?

System details and situation

• Synology NAS DS415+ with 4× 20 TB Seagate HDDs

  • The NAS can temporarily be fixed by installing a 100-ohm resistor, but that’s not a long-term solution. I don’t want to keep running both the NAS and UnRAID separately.

• UnRAID server: HP Z840

  • Currently 1× 1 TB Samsung SSD

  • I also have an old computer that’s failing, so I’ll salvage the SSDs from it to use as cache drives in the UnRAID server.

Do you know which filesystem/profile the Synology uses? It will need to be supported by Unraid to move the drives directly; if it's some kind of RAID, most likely it won't.

I'm 90% certain it's either RAID 5 or 6. So in this case, it will not work to transfer the disks directly to the UnRAID system.
Thanks for the info! I'll start looking for some harddrives that I can put the important data on and then migrate the files to them.

Then once that's done, I'll move the HDD's from the Synology to the UnRAID machine and then I'll probably sell the DS415+.