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here's my current ZFS status :

t@tsu:~$ zpool status pool: bpool state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM bpool ONLINE 0 0 0 73ea4055-b5ea-894b-a861-907bb222d9ea ONLINE 0 0 0 errors: No known data errors pool: rpool state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM rpool ONLINE 0 0 0 7905bb43-ac9f-a843-b1bb-8809744d9025 ONLINE 0 0 0 errors: No known data errors

I want to add the following drive to my pool (for space) :

disks

This is the current disk with the OS (ubuntu 20.04) under ZFS :

disks

t@tsu:~$ sudo lshw -class disk [sudo] password for t: *-disk:0 description: ATA Disk product: Samsung SSD 850 physical id: 0 bus info: scsi@2:0.0.0 logical name: /dev/sda version: 2B6Q serial: S2RBNX0J524197X size: 465GiB (500GB) capabilities: gpt-1.00 partitioned partitioned:gpt configuration: ansiversion=5 guid=32f4df93-2b50-4a68-a888-f0570adac413 logicalsectorsize=512 sectorsize=512 *-disk:1 description: ATA Disk product: Crucial_CT525MX3 physical id: 1 bus info: scsi@4:0.0.0 logical name: /dev/sdb version: R040 serial: 172918010661 size: 489GiB (525GB) capabilities: gpt-1.00 partitioned partitioned:gpt configuration: ansiversion=5 guid=d3e2b4ab-2c44-4da8-ac0c-fdb8053d35da logicalsectorsize=512 sectorsize=512

I can't work out the syntax, I'm pretty sure I'm not supposed to do :

zpool create addonpool /dev/sdb zpool add addonpool mirror /dev/sda4 /dev/sdb

probably more something like this:

zpool add rpool mirror /dev/sda4 /dev/sdb

(because rpool is 4th partition and in the case of the unpartitioned disk, I'm adding the whole disk.)

but yeah I don't know.

Also would logging out and into a tty suffice to perform this or will I have to resort to doing this from a liveUSB?

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3

You were close with your last syntax but you don't need to list the existing partition. This will add the complete new drive as a single disk vdev to your rpool. ZFS will begin striping new data across it once added:

zpool add rpool /dev/sdb

Note that this does not provide redundancy, only additional storage space in your rpool.

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  • do I need to do this from tty? or a live usb? I assumed in logged in session that's a big no-no since I'm bootted and using that partition Commented Jul 8, 2020 at 20:59
  • I did it in a tty, it returned without error in about a second, I rebooted and now I have tons and tons of extra space, thanks you're a hero! come claim some points on askubuntu: askubuntu.com/questions/1256078/… Commented Jul 8, 2020 at 21:43
  • update on this, this actually works on a regular terminal. you don't have to be logged out. Commented Mar 8, 2021 at 17:29

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