Resize mirror boot disks in ZFS

[ptmigmag]

Hi everyone,

I'm noob and for the life of me i can't figure this out:

I had 2x 240GB ssd's in a mirror with proxmox installed. I wanted to replace them with bigger 2TB ssd's and i took adavantage of the mirror and sawpped them one at a time following the instruction for copying the partitions to the new drive and install GRUB to make them bootable.

So far so good i have the 2 new 2TB ssd's installed with the default 3 partitions and as expected i have to "resize" partiton #3 where rpool is, to use all available drive space.

In my search i saw that in ZFS, is not possible to "expand" the partiton and the only possible way is to delete that particular partition and create a new one, this time using all the available space. I would then have to resilver zpool.

So could you explain as i'm a 5 year old how to achieve this?

I'm thinking of doing again: one disk at a time, taking it offline and then delete partiton #3 and make a new one with all available space then turning it online and let it resilver. Then repeat for the other disk.

Thanks helpping this NOOB!!

 

[Kingneutron]

https://serverfault.com/questions/946055/increase-the-zfs-partition-to-use-the-entire-disk

NOTE - do not attempt this if you're not sure of what you're doing, ASK FOR MORE HELP if you don't understand,

Make a full backup of everything that you don't want to lose,

TRY THIS IN A VM FIRST before you mess up your primary environment. Document all the steps for future-you.