SOLVED Error - Converting single disk to mirror

[Shrdlu]

Hello all.

I am in the process of upgrading my system (FreeNAS-11.3-U4.1) and have hit a snag.

My main pool is a Raidz3 of 8 drives and works fine. However my Boot drive and a second pool called Apps were each done as single SSDs which I am now upgrading to mirrors. Upgrading the boot pool was easy enough using System/Boot/Boot Pool Status. However the Apps pool has not been as straight forward.

On searching the forum I came across this guide however I kept getting an error saying that the new drive could not be detected/added (I forget the exact wording).

Further reading of that thread I came across this post/guide by @mgd which is the modified process for encrypted drives. I followed the guide and it all seems to be working fine except for some small problems.

Before carrying on here is a reference table for comparing the guides names to my systems:

Guide names​	My names​	My disk​
tank	Apps	ada3
fake	Apps_new	ada2

After merging the drives, Step 5 of the guide says to detatch the temporary pool "Apps_new" before reboot but I got the error "[ENOENT] None: PoolDataset Apps_new does not exist". Thinking this means that the newer version of FreeNas from that used in the guide has already removed the pool I rebooted the system. The system boots fine and when following Step 7 by going to Storage/Pools/Status of "Apps" both disks are already present and online with no need to "replace" a disk. A quick test of Plex shows access to "Apps" is working but I now find the following errors:

1) In Storage/Pools the pool "Apps_new" is still listed but is yellowed out and locked. Any further attemps to detach it give the same error "[ENOENT] None: PoolDataset Apps_new does not exist"

2) Checking Storage/Pools/Status of "Apps" it correctly shows both ada3 and ada2 in mirror

3)Checking Storage/Disks shows ada2 as stilling being in pool "Apps_new" and ada3 as being pool "Apps"


My thanks in advance to anybody able to help.

 

[sretalla]

Can you share the output from zpool status -v (in code tags)

 

[Shrdlu]

Hi @sretalla

Code:

  pool: Apps

state: ONLINE

status: Some supported features are not enabled on the pool. The pool can

        still be used, but some features are unavailable.

action: Enable all features using 'zpool upgrade'. Once this is done,

        the pool may no longer be accessible by software that does not support

        the features. See zpool-features(7) for details.

  scan: scrub repaired 0 in 0 days 00:04:30 with 0 errors on Sun Aug 23 12:56:20 2020

config:


        NAME                                                STATE     READ WRITE CKSUM

        Apps                                                ONLINE       0     0     0

          mirror-0                                          ONLINE       0     0     0

            gptid/ccb3eed5-d482-11e9-aae2-ac1f6b9a63f4.eli  ONLINE       0     0     0

            gptid/6d9957cb-e52e-11ea-8916-ac1f6b9a63f4.eli  ONLINE       0     0     0


errors: No known data errors


  pool: Main

state: ONLINE

status: Some supported features are not enabled on the pool. The pool can

        still be used, but some features are unavailable.

action: Enable all features using 'zpool upgrade'. Once this is done,

        the pool may no longer be accessible by software that does not support

        the features. See zpool-features(7) for details.

  scan: scrub repaired 0 in 0 days 05:26:28 with 0 errors on Tue Aug 18 08:26:29 2020

config:


        NAME                                                STATE     READ WRITE CKSUM

        Main                                                ONLINE       0     0     0

          raidz3-0                                          ONLINE       0     0     0

            gptid/2e402978-d483-11e9-aae2-ac1f6b9a63f4.eli  ONLINE       0     0     0

            gptid/3077285d-d483-11e9-aae2-ac1f6b9a63f4.eli  ONLINE       0     0     0

            gptid/32a4b37d-d483-11e9-aae2-ac1f6b9a63f4.eli  ONLINE       0     0     0

            gptid/34df8f03-d483-11e9-aae2-ac1f6b9a63f4.eli  ONLINE       0     0     0

            gptid/39e16eb5-d483-11e9-aae2-ac1f6b9a63f4.eli  ONLINE       0     0     0

            gptid/3ed181d8-d483-11e9-aae2-ac1f6b9a63f4.eli  ONLINE       0     0     0

            gptid/43f0a912-d483-11e9-aae2-ac1f6b9a63f4.eli  ONLINE       0     0     0

            gptid/490228b0-d483-11e9-aae2-ac1f6b9a63f4.eli  ONLINE       0     0     0


errors: No known data errors


  pool: freenas-boot

state: ONLINE

  scan: scrub repaired 0 in 0 days 00:00:05 with 0 errors on Mon Aug 24 03:45:05 2020

config:


        NAME        STATE     READ WRITE CKSUM

        freenas-boot  ONLINE       0     0     0

          mirror-0  ONLINE       0     0     0

            ada0p2  ONLINE       0     0     0

            ada1p2  ONLINE       0     0     0


errors: No known data errors

 

[Shrdlu]

Managed to fix the problem. I offlined and removed the disk in ada 2 then I was able to delete the pool Apps_new. The disk was then reconnected, wiped and added back into the mirror for for Apps.