Register for the iXsystems Community to get an ad-free experience and exclusive discounts in our eBay Store.

Building a pool with one slightly different drive

Joined
Jan 20, 2020
Messages
2
Hi Guys,

I'm trying to create a pool with 8 SSDs that I have. 7 of them are identical, at 223.57GB. One of them is newer and has slightly more space at 232.89GB.

I honestly don't care about "losing" the 9GB from the newer drive. I gain way more by having the 8th drive in the pool at the smaller size.

But the UI refuses to let me create the pool! Creating the pool at the size of the smallest drive is fine by me.

It also concerns me because let's say I leave out that 8th drive and just create the pool with the 7 identical ones. What happens in the future if one of those drives dies and needs to be replaced? That drive is NLA, I don't know that I'll find one identically sized one anywhere. Would I be SOL and unable to replace it with a larger drive?

See attached screenshot.

Cheers,

Jon
 

Attachments

woods

Newbie
Joined
Jul 27, 2018
Messages
43
I'm a complete noob, but I did read something about this yesterday:


But don't just go and do it manually on my word, I hope someone more knowledgeable joins the discussion to make sure you're not making a mistake.

Perhaps this is what you're looking for:

After a vdev is created, more drives cannot be added to that vdev. However, a new vdev can be striped with another of the same type of existing vdev to increase the overall size of the volume.
 
Joined
Jan 20, 2020
Messages
2
Interesting. It looks like I accidentally downloaded and installed 11.3RC1 instead of 11.2U7. The docs for 11.3 don't show a manual creation section so maybe it hasn't been implemented yet.

I guess I'll reformat and downgrade my server to 11.2U7 and make a manual volume/pool then.

Thanks!
 

Baenwort

Newbie
Joined
Feb 19, 2015
Messages
49
Did you chase down and put in a bug report about your case?
 

efigalaxie

Newbie
Joined
Feb 3, 2020
Messages
8
I have tried to do this as well. 11.3 is what is delivered from the main download page and is what I have installed.

As of this time.....The GUI will NOT allow a disk of slighly differing size from the others. Being new, I have not added to an existing pool or simply replaced and resilvered.
 

woods

Newbie
Joined
Jul 27, 2018
Messages
43
not sure about how it *should* work but in my case I made my vdevs with identical drives and then replaced a few faulty ones with bigger ones. The volume will only increase when all the drives are larger.
 

efigalaxie

Newbie
Joined
Feb 3, 2020
Messages
8
I am even newer, but I am gathering that there is a bug in 11.3. There was an option in older versions to force the issue.
 

woods

Newbie
Joined
Jul 27, 2018
Messages
43
oh weird. I did read the 11.3 manual to figure out how to add one bigger drive. Perhaps I skimped over the part where it says you should be able to force it
 

blueether

FreeNAS Experienced
Joined
Aug 6, 2018
Messages
230
I am even newer, but I am gathering that there is a bug in 11.3. There was an option in older versions to force the issue.
Well it's not a bug, it is intended to behave as it does in 11.3. I think there is a open bug report for it though and if enough people start to complain that they can nolonger create vdevs it might get rolled back
 

Baenwort

Newbie
Joined
Feb 19, 2015
Messages
49
Well it's not a bug, it is intended to behave as it does in 11.3. I think there is a open bug report for it though and if enough people start to complain that they can nolonger create vdevs it might get rolled back
Can you link to the bug report?

I think I should be able to choose to have it make a vDev that is the size of the smallest drive. With many SSDs you won't get a exact size match.
 

blueether

FreeNAS Experienced
Joined
Aug 6, 2018
Messages
230
Top