60 X 14TB Drive TrueNas backup solution.

[Davvo]

It might be a bit late, but the following list could be of help.

Resources List including Detailed Hardware and System Build Notes (plus new user advice / help)

This resource was originally created by user: [WI_Hedgehog] (https://www.truenas.com/community/members/wi_hedgehog.116993/) on the TrueNAS Community Forums Archive. Please DM this account or comment in this thread to claim it. TrueNAS is not as simple as videos make it look, though it is...

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Since you have more experience with large volumes, let me ask you this: If I set up 60 drives and copy 500+ TB of data to them, then add an additional 60 empty drives to expand the pool size, will this process take a lot of time? These will be blank drives added to the existing pool to increase its size. Will the data be moved across the drives, or will the newly added drives simply be used for storing new data as it is written?

As others have said ZFS will take care of this with time... but if you need there is a in-place balancing script that basically rewrites the data, resulting in equally full vdevs.

My plan is to create four vdevs [...] using raidZ2 with 15 drives each.

In terms of settings and options, I have disabled [...] compression.

Is your data incompressible? Otherwise I see little reason to do so, except maybe performance testing.

I have chosen the configuration of 5 x 12 Vdev Raid-Z3. However, I'm wondering if using Raid-Z3 is necessary in this case.

Depending on the importance of your data, the time and money you can spend into monitoring, the response time if something brokens and you need to replace it, and the presence of hotspares you could go RAIDZ2: scripts such as the multi_report greatly help in monitoring those drives, and unless we are talking about critical data (not this case it appears) or the system is in a plance far away from you that would impose penalties on drive replacement I'd not exclude going Z2... knowing that a certain famous youtuber royally screwed up a similar setup.

Also, while it should be standard with SAS drives of such sizes, make sure to use at least 1e-15 URE ones.

Edited for formatting and grammar corrections.