I seek confirmation or denial that I have build this NAS properly

TrueNAS General
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Hi there,

I read a lot. But I also come across contradictions here and there. So, I hope you can tell me if i got it right in the end…

I’ve partly ‘build’ my NAS to the specs I think should work. It is a Ugreen 4800+ and I really, REALLY like the thing! My cute little powerhouse :wink:

  • I put 4 14TB Ironwolfs in it.
  • I put 64GB Corsair DDR5 4800 RAM in it.
  • I’ve mounted 2, 128GB SSDs.

1 SSD is configured as a cache VDEV. The other is a log VDEV. I know. No redundancy here.

It is working so far. But when I copy larger files like say 5GB, the 10GB speed seems to drop back to disk speed. That’s about 4Gbit/s. That’s not a problem but I do wonder where that bottleneck would be then… Did I misconfigure it somewhere?

Thanks in advance…

Rex.

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You said it: Disk speed.
SLOG is not a write cache, it is only used for sync writes. You probably do not need a SLOG.
And with 64 GB RAM you may not have much use for a L2ARC either.

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Well, looks like I did understand things wrong after all. What is your advice in my case?

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  1. What layout did you use for the 4x 14TB drives? Mirrors, RAIDZ1 or RAIDZ2?

  2. Are you going to use this for anything other than network storage? Are you going to run apps or VMs, and if so will you need an SSD pool to support them?

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Thanks for your question.

RAIDZ1 is the layout. I’m not planning to run apps on it. No VM’s. Just TrueNAS on bare metal. It should be secure. And it should host files. So no fooling around, creating potential security holes.

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If that is your only data storage, Raid-Z2 is the recommendation with drives that large. The stress of a resilver with drives that large could have another drive failure and takes out the pool and all the data.

Raid-Z1 is okay if you have current backup to restore a failed pool from.

You should have you data backed up somewhere else anyway.

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I have a second TrueNAS. My old one. A homebrew version with a gen 9 i3 and 64GB RAM. It keeps a copy of the important files in the new one. RAIDZ1 should do the job.

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Even RAID6/mirror is no running backup! Or RAIDZ2 in this case. Always keep copies of important data my dad told me :wink: