Raid Configuration for 12x4tb drives

[kaii_contractor]

Hi, I am relatively new to truenas and have a few questions about how to configure 12 Drives, after going through the forum, I still don’t have a definitive answer.

Option 1: all 12 drives in a single vdev with raidz2/3. (Apparently Very bad)

Option 2: 2x 6 drive vdevs with raidz2

Option 3: 12 vdevs (one drive each) with raidz2/3

Use case: general file server (lots of smaller files), mainly writes. And backup server for PCs.

I can add SSDs as a metadata/log cache and if I understand it correctly, RAM will automatically be used as a write cache.


Please let me know what option you think would be best, or if a completely different option would better suited. Redundancy is the most important but so is the performance and end disk size ( I would be willing to give Upto 4 disks in parity).

Thanks in advance for any help

 

[NugentS]

Please read forum rules in red at the top of the page

 

[WI_Hedgehog]

Please read forum rules in red at the top of the page

Oh, WHAT??? Please use SEARCH! This topic was just asked and answered TWO DAYS AGO!!!

(And welcome to the forum.)

 

[NugentS]

Why would I search for anything?
The OP has asked a question, without posting his hardware as both I and you (@WI_Hedgehog) do.

 

[kaii_contractor]

Hi, I’m sorry if I missed something, I did have a look again and can’t find a thread(s) that answers my questions, if you have one in mind could you please link it?
From what I have found I should either go with option 2 or option 3, but am not sure.
As for Option 2, I have read that performance might be really slow.
As for Option 3, I am not sure weather it is ok or good to have 12 vdevs in a pool with raidz2/3, or if this will cause data integrity issues.

As for the hardware, I haven’t yet purchased the server, but am looking at a used Dell server with 12 bays. As for the drives, they would be new seagate 4tb Ironwolf Nas Drives.

I’m sorry if the answer seems obvious, but I’m not that familiar with ZFS and don’t want to have any issues with the setup in the future.

Thanks again and any help would be really appreciated.

 

[sretalla]

Option 1: all 12 drives in a single vdev with raidz2/3. (Apparently Very bad)

I don't know about "very bad"... you're probably talking close to the limits, but with only 4TB drive size, resilver/scrub times may stay reasonably low (maybe 1 day).

Option 2: 2x 6 drive vdevs with raidz2

That probably hits all of your requirements, but does cost 4 drives in parity.

Option 3: 12 vdevs (one drive each) with raidz2/3

That doesn't exist... the first part describes a 12 disk pool with no parity at all and the second part has nothing to connect to. Doesn't meet your redundancy requirement.

 

[kaii_contractor]

Ok thanks a lot!
Will go with option 2 then

 

[WI_Hedgehog]

Why would I search for anything?
The OP has asked a question, without posting his hardware as both I and you (@WI_Hedgehog) do.

You already know the information, however the OP needs that advice.

Here are two links for @kaii_contractor:

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