Question

0

Cannot replace missing disk in raidz

rated 0 times [ 0] [ 0] / answers: 1 / hits: 1965 / 1 Year ago, thu, february 16, 2023, 8:05:47

My raidz is degraded after the change of my motherboard - a disk cannot be found. The missing disk used to be /dev/sdh but now it is named /dev/sdg - which is the cause of the problem.

In the degraded zpool I managed to offline the missing disk by using its uid (which I found using the zdb command). So now the degraded pool looks like this:

pool: Media

state: DEGRADED

status: One or more devices has been taken offline by the administrator.

    Sufficient replicas exist for the pool to continue functioning in a

    degraded state.

action: Online the device using 'zpool online' or replace the device with

    'zpool replace'.

scrub: scrub completed after 2h10m with 0 errors on Thu May  1 14:02:43 2014 

config:



    NAME                                                      STATE     READ WRITE CKSUM

    Media                                                     DEGRADED     0     0     0

      raidz1-0                                                ONLINE       0     0     0

        disk/by-id/ata-WDC_WD2003FYYS-02W0B0_WD-WMAY00171958  ONLINE       0     0     0

        disk/by-id/ata-WDC_WD2003FYYS-02W0B1_WD-WCAY00424060  ONLINE       0     0     0

        disk/by-id/ata-WDC_WD2003FYYS-02W0B1_WD-WMAY04082675  ONLINE       0     0     0

      raidz1-1                                                DEGRADED     0     0     0

        sde                                                   ONLINE       0     0     0

        sdf                                                   ONLINE       0     0     0

        sdh                                                   OFFLINE      0     0     0

However, I do not succeed in replacing /dev/sdh by /dev/sdg:

zpool replace Media 3840188586753206212 /dev/disk/by-id/ata-WDC_WD20EZRX-00D8PB0_WD-WMC4M1843609 -f

invalid vdev specification

the following errors must be manually repaired:

/dev/disk/by-id/ata-WDC_WD20EZRX-00D8PB0_WD-WMC4M1843609 is part of active pool 'Media'

... how can I solve this problem?

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

lassrake

Add To Favorites

Follow

Total Points: 400

Total Questions: 103

Total Answers: 98

Location: Netherlands

Member since Mon, Jun 22, 2020

4 Years ago

lassrake questions

1 How to stop an individual snap from updating Ubuntu 22.04 LTS

Wed, Mar 8, 23, 22:10, 1 Year ago

1 Amazon Workspaces Client not working on 22.04

Sun, Mar 6, 22, 08:53, 2 Years ago

1 NordVPN gets stuck in reconnecting state leaving no access to internet

Sat, Jul 24, 21, 06:56, 3 Years ago

1 On screen keyboard: why does it have no special keys like Esc, Ctrl, Alt, Tab or arrow keys?

Thu, Jul 21, 22, 04:09, 2 Years ago

1 Static IP with Netplan causes slow internet speed (Ubuntu Server 20.04)

Sun, Nov 13, 22, 21:27, 2 Years ago

View All

answered 1 Year ago tigehanc · Accepted Answer

I solved it. Although not entirely sure how. At some point along the way (I think after exporting the pool and importing it again with a different name), the drives were not addressed by their traditional name "/dev/sd*" but by their ID. I did not do anything to force the ID addressing scheme - it just happened.

        NAME                                                      STATE     READ WRITE CKSUM

    Media                                                     ONLINE       0     0     0

      raidz1-0                                                ONLINE       0     0     0

        disk/by-id/ata-WDC_WD2003FYYS-02W0B0_WD-WMAY00171958  ONLINE       0     0     0

        disk/by-id/ata-WDC_WD2003FYYS-02W0B1_WD-WCAY00424060  ONLINE       0     0     0

        disk/by-id/ata-WDC_WD2003FYYS-02W0B1_WD-WMAY04082675  ONLINE       0     0     0

      raidz1-1                                                ONLINE       0     0     0

        disk/by-id/ata-WDC_WD2003FYYS-02W0B1_WD-WCAY00788302  ONLINE       0     0     0

        disk/by-id/ata-WDC_WD2003FYYS-02W0B1_WD-WCAY01088068  ONLINE       0     0     0

        disk/by-id/ata-WDC_WD20EZRX-00D8PB0_WD-WMC4M1843609   OFFLINE       0     0   0

Whenever i then tried to replace the above mentioned faulty device with /dev/sdg, the computer returned a device /dev/sdg is busy error. It turned out that due to the change to ID addressing, the pool somewhat "healed" itself.

When i realized that the entry in the zpool was already pointing to the ID of the device /dev/sdg that I was trying to set, I just had to put the drive online with

zpool online Media /dev/disk/by-id/ata-WDC_WD20EZRX-00D8PB0_WD-WMC4M1843609

and the pool started resilvering.

BTW.: I also tried a to wipe the data from the drive /dev/sdg to clear all labeling and make the drive forget that it is already part of an active pool. I do not think that it helped but maybe it had an effect that I am not aware of. The dd clearing is described in the above mentioned threads.

I hope this helps someone with a similar problem.
Thanks to everyone who took the time to read through my problem.