Converting two striped disks to one larger disk

TrueNAS General
1

Hello everybody,

im sure you have just seen this question asked over and over but i can’t find any solution to my “problem”.
my truenas scale installation consist of a boot pool with an ssd and another pool for data with two (1tb each) striped SSDs. Now, i want to migrate the actual striped disks to one (for now) 12tb disk and utilize the ssds for other things. Is there any way to do it without losing any data/configurations? I know that striped in general is a bad thing but when i started with truenas scale i just wanted to try to use it but now after few years i accumulated a lot of things and configurations and i don’t want to start over again.

thank you all in advance and sorry for my bad english.

2

You can create a new pool and then use replication to transfer the datasets to the new pool.

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hi winnie, thanks for your fast reply.
Is there any guide on how to do the replication? Doing this will maintain the complete configuration? i also have shares and users configured and i don’t wanna do it all again :frowning:

4

Easier answer, I think: replace one SSD with the spinner, then remove the second SSD from the pool.

5 Likes
5

oh cool. It seems more easier for my use case i think. Then it is possible to replace a striped disk without losing anything? I thought that it wasn’t possible . And after i replace one of the SSDs with the spinner how can i remove the second ssd? is it possible from the GUI?

thank you so much to you too!

6

Yes, so long as you don’t remove the drive you’re replacing first. If a drive in a striped pool fails, the whole pool is gone. But if it’s still healthy, you can plug in a new drive, replace the one with the other, then remove the old one. And yes, it can all be done in the GUI.

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Yeah, the pool is healthy. So If i’m not misunderstanding, when i replace the ssd with the spinner, i can remove all the two SSDs that where part of that pool and utilizing only the 12tb one? Because my last step would be to get rid of the two SSDs

8

Replacing the one SSD removes it from the pool (because you replaced it, it’s no longer in the pool). You can then, using the GUI, remove the other one from the pool. You might even be able to invert the order (remove the second SSD, then replace the first with the spinner) if the pool isn’t too full.

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Hmm, the pool is at 86% utilization. But if i don’t invert the order of your suggestions, i’ll still be able to do this right?

10

Yep.

1 Like
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Oh i’m happy to hear this. Thank you so much. I will update the thread in the next days because i will receive the hdd on friday so i’ll let you know if everything went well.
For now, i thank you all!
Greetings, Salvo

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Test this HDD before putting it in use, and mind that you’ll still have no redundancy. A second HDD to make a mirror would be a good idea.

3 Likes
13

Yes i’m planning to do this in the next few months, i’ll add another disk or two. Thank you for your suggestion

14

All done! It worked flawlessly! The resilvering process took about 19 hours for about 2tb data. I’m using an lsi 9211-4i hba with IT firmware and everything is working perfectly.
Thank you so much everyone!
Best regards, Salvo

1 Like