Is it possible to upgrade a 4 X 2TB zpool to 4 X 4TB?

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Re: Is it possible to upgrade a 4 X 2TB zpool to 4 X 4TB?

Postby BB86-142 » Tue Feb 14, 2023 11:43 am

New ZFS user here.

I'm halfway through an upgrade like this myself. 2/4 drives went smoothly but I'm having trouble with the last two drives.

I'm getting an error code of:
cannot label 'disk1' : cannot label 'dev/disk1/: unable to open device: 16

The command I've been trying is zpool replace:

Code: Select all
 sudo zpool replace -f Z4 10471030020862961544 /dev/disk1
BB86-142
 
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Re: Is it possible to upgrade a 4 X 2TB zpool to 4 X 4TB?

Postby roemer » Tue Feb 14, 2023 5:27 pm

Are you sure that /dev/disk1 is the correct drive you want to add to your pool?
I am asking because on my M1 Macbook, disk1 is the internal pre-boot partition which you probably don't want to use for ZFS ... ;)

On which operating system and Mac hardware (Intel or Apple Silicon) are you?
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Re: Is it possible to upgrade a 4 X 2TB zpool to 4 X 4TB?

Postby BB86-142 » Wed Feb 15, 2023 5:45 am

I'm fairly certain, yes. I believe mine is set up where disk3 is running the OS. It's not present in my zpool.

I have an early 2008 Mac Pro (Intel) running Yosemite.
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Re: Is it possible to upgrade a 4 X 2TB zpool to 4 X 4TB?

Postby ranvel » Wed Sep 13, 2023 5:31 pm

I came across this post due to its high search engine ranking and I tried the commands provided by lundman, and they didn't work at all. I even upgraded to the latest O3X version (2.1.6 at the time of writing).

I couldn't seem to get anything to work and to be honest, I wasn't too intrepid about the matter due to the consequences of a borked filesystem.

So I'm writing this for anyone who may come across this in future.

I'm not sure how common it is to expand O3X pools, but I imagine that due to the vanishingly small amount of systems that could even support this configuration, it is not good. See this thread https://openzfsonosx.org/forum/viewtopic.php?f=26&t=3353&p=11545&hilit=expand+pool#p11545

In any case, I loaded up the latest FreeBSD image on a USB drive, rebooted into the shell and then expanded the pools from the Live Shell.

Your command should look something like this to format the USB drive:
Code: Select all
dd if=FreeBSD-13.2-RELEASE-amd64-memstick.img of=/dev/disk5 bs=1m conv=sync


When you're in the live shell, get the drive IDs using
Code: Select all
zpool status tank

Then expand them using the typical commands, like:
Code: Select all
zpool online -e tank gptid/00000000-0000-0000-0000-000000000000


In my experience of one test, I wasn't able to immediately verify that the expansion had taken place, so I exported and then re-imported the pool.
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