[SOLVED] Making rpool mirrored if it was not already

[KAMALA]

Hello everyone,

I am wondering how to make "rpool" mirrored of a PVE which is not mirrored ? the hypervisor has been installed / prepared on RAID 0 now I want to mirror it.

Is it possbile to mirror it? if yes could you please help me know how that can be done?

Thanks
Yaseen

 

[KAMALA]

Hello everyone,

I am wondering how to make "rpool" mirrored of a PVE which is not mirrored ? the hypervisor has been installed / prepared on RAID 0 now I want to mirror it.

Is it possbile to mirror it? if yes could you please help me know how that can be done?

Thanks
Yaseen

Is this possible or not? Could you please help me with that ?

Thank you so much in advance for your help

 

[leesteken]

Is this possible or not? Could you please help me with that ?

It's almost the same as replacing a second drive in a mirror (and there are already many threads about this). Open the manual ( https://pve.proxmox.com/pve-docs/pve-admin-guide.html#chapter_zfs ) and go to section "Changing a failed bootable device".

 

[KAMALA]

It's almost the same as replacing a second drive in a mirror (and there are already many threads about this). Open the manual ( https://pve.proxmox.com/pve-docs/pve-admin-guide.html#chapter_zfs ) and go to section "Changing a failed bootable device".

Thank you so much for your help,
I am on PVE7.4-3 and here is the output of

proxmox-boot-tool status

Could you please tell me what are the next steps to follow if you do not mind?

Thanks

 

[KAMALA]

It's almost the same as replacing a second drive in a mirror (and there are already many threads about this). Open the manual ( https://pve.proxmox.com/pve-docs/pve-admin-guide.html#chapter_zfs ) and go to section "Changing a failed bootable device".

My "rpool" is already got 2 1Tb disks and it's not mirroring (accedently I made a mistake and I do not want re-install it from zero) I just want to create the mirror!



How creating a mirror can be the same as replacing a failed disk?

I do not have anything to replace!

Thanks for your help and patince

 

[leesteken]

My "rpool" is already got 2 1Tb disks and it's not mirroring (accedently I made a mistake and I do not want re-install it from zero) I just want to create the mirror!

Recent ZFS versions can remove one of the vdevs: https://openzfs.github.io/openzfs-docs/man/master/8/zpool-remove.8.html . And then attach the same /dev/disk/by-id/ata-....-part3 as a mirror: https://openzfs.github.io/openzfs-docs/man/master/8/zpool-attach.8.html .

 

[KAMALA]

Recent ZFS versions can remove one of the vdevs: https://openzfs.github.io/openzfs-docs/man/master/8/zpool-remove.8.html . And then attach the same /dev/disk/by-id/ata-....-part3 as a mirror: https://openzfs.github.io/openzfs-docs/man/master/8/zpool-attach.8.html .

That is great I am try to test withina VM:

I have to a VM with 2 disk

rpool - RAID0:
sda
sdb

removed "sdb" by executing "

zpool remove rpool sdb

"

now I only have 1 disk in the VM and still working fine and formated "sdb"



when I try to attach the disk to the rpool it's not working and when I mirror to the command I got that error message


too many arguments




Could you please help me to know what is the command I should use to attach the disk to the pool again as mirror or the steps please.


Thank you so much for your help

 

[leesteken]

when I try to attach the disk to the rpool it's not working and when I mirror to the command I got that error message

View attachment 76117
too many arguments

View attachment 76118


Could you please help me to know what is the command I should use to attach the disk to the pool again as mirror or the steps please.

zpool attach rpool /dev/sda3 /dev/sdb but it's better to use /dev/disk/by-id/... instead. Also, since it is the rpool but should partition the drive and use the steps in Changing a failed bootable device in the Proxmox manual: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#sysadmin_zfs_change_failed_dev

 

[waltar]

Within your testvm you have first to cp the partion table before zpool attach rpool /dev/sda3 /dev/sdb3 !!

 

[KAMALA]

zpool attach rpool /dev/sda3 /dev/sdb but it's better to use /dev/disk/by-id/... instead. Also, since it is the rpool but should partition the drive and use the steps in Changing a failed bootable device in the Proxmox manual: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#sysadmin_zfs_change_failed_dev

Copied the partion table for sda into sdb



then I tried the attach command but iI reallt did not work



I really appreciate your help, any idea why? or what to do?

Thanks agin for your great help

 

[waltar]

sdb --> sdb3 !!

 

[KAMALA]

sdb --> sdb3 !!

same !

 

[KAMALA]

same !

View attachment 76124

may I know where are those configuration are located! to check it? or may I can modify the config file manaualy as it's stated in the message, what do you think?

 

[waltar]

Try without ashift as it's already set with creation and cannot set again.
zpool attach -f rpool /dev/sda3 /dev/sdb3

 

[KAMALA]

Try without ashift as it's already set with creation and cannot set again.

already did tried it, it asks for it:

 

[KAMALA]

and here is with only "-f", etc.

 

[waltar]

zdb -l /dev/sda
zdb -l /dev/sdb
ls -l /dev/disk/by-id

 

[KAMALA]

zdb -l /dev/sda

zdb -l /dev/sdb

ls -l /dev/disk/by-id

 

[waltar]

sdb shows path /dev/sda.
.../by-id doesn't show the 2 disks also, maybe due to your virtual testing.
zpool status ?

 

[KAMALA]

sdb shows path /dev/sda.
.../by-id doesn't show the 2 disks also, maybe due to your virtual testing.
zpool status ?