zfs on 1 volume ?

[benoitc]

Due to some order issues I only received one of the main disk for the system (M2 NVME) and i would like to start the setup. Is this possible to set it as zfs0 and then come back later? What coul dbe an issue?

 

[aaron]

You can create a single disk pool during installation and once you have the second disk and want to add it to create a mirror you can do so by following the guide to replace a failed ZFS boot disk [0] and instead of the zpool replace command you then run

zpool attach rpool <current disk> /dev/disk/by-id/<new disk>-part3

This should attach it as mirrored disk to the existing one.


[0] https://pve.proxmox.com/pve-docs/pve-admin-guide.html#sysadmin_zfs_change_failed_dev

 

[benoitc]

You can create a single disk pool during installation and once you have the second disk and want to add it to create a mirror you can do so by following the guide to replace a failed ZFS boot disk [0] and instead of the zpool replace command you then run

zpool attach rpool <current disk> /dev/disk/by-id/<new disk>-part3

This should attach it as mirrored disk to the existing one.


[0] https://pve.proxmox.com/pve-docs/pve-admin-guide.html#sysadmin_zfs_change_failed_dev

Thanks! Just to precise things but then setting it as raid0 during setup is enough right?

 

[aaron]

just to precise things but then setting it as raid0 during setup is enough right?

View attachment 21183

exactly

 

[benoitc]

exactly

cool, thanks a lot for the information

 

[benoitc]

for people that eventually came to this topic, what I did to attach the new disk was the following (based on this thread):

1. replicate the current disk to the new disk:
   sgdisk --replicate=/dev/<device B> /dev/<device A>
   
   
2. create a random uid
   sgdisk --randomize-guids /dev/<device B>
   
   
3. install grub:
   grub-install /dev/<device B>
   
   
4. finally attach the disk and wait
   zpool attach rpool<current disk id> /dev/disk/by-id/<newdisk id>
   
   
5. You can check the status:
   
   

   # zpool status
   pool: rpool
   state: ONLINE
   scan: resilvered 1.03G in 0 days 00:00:01 with 0 errors on Tue Nov 17 11:14:10 2020
   config:
   
   NAME STATE READ WRITE CKSUM
   rpool ONLINE 0 0 0
   mirror-0 ONLINE 0 0 0
   <disk id B> ONLINE 0 0 0
   <disk id A>  ONLINE       0     0     0

Hope it helps