Removing a disc

[sekroots]

Hello. How can i remove a disk from my pool?

Code:

root@POC-STGMASTER[~]# zpool status -x
  pool: tank
 state: DEGRADED
status: One or more devices could not be opened.  Sufficient replicas exist for
        the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
   see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-2Q
  scan: scrub repaired 0B in 00:00:03 with 0 errors on Fri Mar 25 09:44:47 2022
config:

        NAME                                            STATE     READ WRITE CKSUM
        tank                                            DEGRADED     0     0     0
          raidz1-0                                      DEGRADED     0     0     0
            gptid/089c83bb-a52a-11ec-b3bf-00155d032ee0  ONLINE       0     0     0
            gptid/08b257e6-a52a-11ec-b3bf-00155d032ee0  ONLINE       0     0     0
            gptid/08a9944c-a52a-11ec-b3bf-00155d032ee0  ONLINE       0     0     0
            gptid/08b70295-a52a-11ec-b3bf-00155d032ee0  ONLINE       0     0     0
            gptid/08cad6bc-a52a-11ec-b3bf-00155d032ee0  ONLINE       0     0     0
            16293776385333853924                        UNAVAIL      0     0     0  was /dev/gptid/08c3dbb8-a52a-11ec-b3bf-00155d032ee0

errors: No known data errors
root@POC-STGMASTER[~]#
root@POC-STGMASTER[~]# zpool remove tank /dev/gptid/08c3dbb8-a52a-11ec-b3bf-00155d032ee0
cannot remove /dev/gptid/08c3dbb8-a52a-11ec-b3bf-00155d032ee0: operation not supported on this type of pool
root@POC-STGMASTER[~]#

 

[Patrick M. Hausen]

You can only replace, not remove, a failed disk from a RAIDZ1 vdev.

 

[sekroots]

OMG. really?

Let´s imagine this disk has a failure. Where is ZFS redundancy?

 

[Patrick M. Hausen]

OMG. really?

Of course. Apart from single <--> mirror (attach/detach) you cannot change the redundancy level of a vdev.

Let´s imagine this disk has a failure. Where is ZFS redundancy?

You replace the failed disk to rebuild your desired level of redundancy. All the while the pool continues to work even without redundancy and no data is lost (hopefully).

 

[Stux]

Believe RaidZ expansion is coming

RAID-Z Expansion Feature for ZFS In the Home Stretch | FreeBSD Foundation

The Foundation sponsored feature reflows existing data to rewrite it onto a new arrangement of disks thereby freeing space at the end of the logical RAID-Z group The FreeBSD Foundation funded the project to ensure the completion and release of an easy-to-use and practical application. The...

freebsdfoundation.org

IIRC it may work in reverse too, its been a while since I looked into it

 

[Yorick]

Believe RaidZ expansion is coming

RAID-Z Expansion Feature for ZFS In the Home Stretch | FreeBSD Foundation

The Foundation sponsored feature reflows existing data to rewrite it onto a new arrangement of disks thereby freeing space at the end of the logical RAID-Z group The FreeBSD Foundation funded the project to ensure the completion and release of an easy-to-use and practical application. The...

freebsdfoundation.org

IIRC it may work in reverse too, its been a while since I looked into it

Won’t work in reverse.