Synology DS220J change from 2 SSD to 2 HDD

[Nesalex]

Hello. I have a Synology DS220J. There are 2 SSDs inside RAID1. I would like to exchange it for 2x HDD so that I can use the SSD somewhere else. I read that the NAS cannot work with 1x SSD and 1x HDD. My first plan was to replace 1 disk and then the other. I don't want to lose the data stored on the disks. Can anyone advise how it could be done other than copying the data to an external drive and reinstalling and setting up the system? Well thank you

 

[bbunge]

Hello. I have a Synology DS220J. There are 2 SSDs inside RAID1. I would like to exchange it for 2x HDD so that I can use the SSD somewhere else. I read that the NAS cannot work with 1x SSD and 1x HDD. My first plan was to replace 1 disk and then the other. I don't want to lose the data stored on the disks. Can anyone advise how it could be done other than copying the data to an external drive and reinstalling and setting up the system? Well thank you

Should not matter if the drives are SSD or spinning rust as long as the new drives are the same size or larger. I upgraded my DS218J from 4 TB to 8 TB then put the 8 TB drives in a new DS220+.

 

[coxhaus]

So, with Synology if you replace both drives in the RAID with larger drives can you increase the size of the RAID? You can with server controllers, after market controllers, because it is just a logical container overlaid on a physical drive.

 

[sfx2000]

I would like to exchange it for 2x HDD so that I can use the SSD somewhere else. I read that the NAS cannot work with 1x SSD and 1x HDD. My first plan was to replace 1 disk and then the other. I don't want to lose the data stored on the disks. Can anyone advise how it could be done other than copying the data to an external drive and reinstalling and setting up the system?

Before you do anything - back up the data that is on the NAS - so you will need an external drive.

If you don't do this - odds are very high that you will miss something when juggling disks, and your data will be gone...

Once done, pop out the two SSD's, drop in a pair of matched HDD's, and you're back in business...

 

[sfx2000]

So, with Synology if you replace both drives in the RAID with larger drives can you increase the size of the RAID?

Only for JBOD for most use cases...

For RAID - limits still apply for mismatched sizes, size of the smallest disk - the spare space can be reused as another volume.

SHR can do some more with this, but a mismatch between SSD and HDD in a pair is asking for trouble, even with SHR and BTRFS (if his model can do BTRFS, if I recall that's x86 only, not ARM).

What is Synology Hybrid RAID (SHR)? - Synology Knowledge Center

Synology Knowledge Center offers comprehensive support, providing answers to frequently asked questions, troubleshooting steps, software tutorials, and all the technical documentation you may need.

kb.synology.com

The DS220J is Realtek, so EXT4, no BTRFS support...

 

[coxhaus]

JBOD is not RAID, it is separate disks.

For clarification I understand when you replace the first disk of a RAID you are still limited to the RAID size. But once you replace say the second disk of a 2 drive RAID and both disks now match in size and are bigger disks can you expand the RAID out to the new full size disks? You can do this with like Dell RAID controllers, IBM or Intel controllers. You can expand the container out to the new full size disks. I do not know if you can do this with a NAS as I have not worked NASs very much. You can do this real time without taking the RAID down with server controllers.
Your link kind of implies this but I am not sure.