How to increase the HDD size of SHR on a DS918+?

[Cobra]

I currently have 4 3TB drives in SHR. If I want to replace them with 4 6TB drives, do I have to add one at a time then rebuild the pool?
Thanks

 

[EAZ1964]

Yes, that is the way to go, there is an extensive document on disk management and upgrading on the synology knowledgebase that guides you through the process. The operation is not risk free, so have your backups completed in case a disk fails during the stressy 3 times rebuild.

 

[Trollti]

Indeed, you have to go to disk management, deactivate the first HDD, then you pull it out, replace it with your new 6TB (that you, obviously, have surface checked before or made a long smart test) then you repair your volume, once that done, you do it all over again for the 3 other disks.

After that, you have to expand your volume (assuming you only have one) to the new maximum avaible size and voilà.

I just did it on a raid5 made of 9 disks from 6TB to 8TB the disk, took me easily a good big two weeks.

Of course it is best not to use your NAS during that kind of upgrade, at least not heavily. (Anyways, it will be very very slow)

What you can perhaps do, I never tried, is to upgrade one disk, see if you can expand your SHR volume, wait a week, and do it again, and so forth and so on.

This can perhaps help the stress on the 3TB disks wich I think are very quite old.

Also a good idea, is to dismantle your syno, and give it good compressor cleaning, so that you avoid hotspots when you repair the parity.

If your in hot place you can also put fan over the nas, but don't put in the fridge

Hope this helps.

 

[Telos]

On a 918+ you can pull the drive hot, and insert its replacement hot. Then rebuild via Storage Manager.

Quite easy... Same procedure as here:

Replace a Drive | DSM - 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

 

[Trollti]

On a 918+ you can pull the drive hot, and insert its replacement hot. Then rebuild via Storage Manager.

Quite easy... Same procedure as here:

Replace a Drive | DSM - 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

Easy it is, but 3TB are old tech drives... it's perhaps better to deactivate the drive first rather than pull it out hot.

-- post merged: 26. Jul 2021 --

I forgot to mention that I found the rebuild did go faster with the ssd cache disabled

 

[Cobra]

Thanks guys

 

[Rusty]

it's perhaps better to deactivate the drive first rather than pull it out hot

I do it all the time with some of my 3TB drives in RAID6 configurations and never had any problems.