Can't add mirror vdev to existing pool? Only stripe

[Fish]

Hey all,

For a long time I've had a pool of 2 drives, mirrored called blue. A few months back, one of the drives failed and through a hilarious course of events (WD sent a DOA replacement drive), I somehow ended up with a pool that now consists of just one drive (I think).

Code:

root@freenas[~]# zpool status blue
  pool: blue
 state: ONLINE
status: Some supported and requested 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 0B in 15:25:48 with 0 errors on Sun Aug  6 15:25:48 2023
config:

    NAME                                          STATE     READ WRITE CKSUM
    blue                                          ONLINE       0     0     0
      gptid/0b6fa99c-c530-11ed-af95-00259047b5b9  ONLINE       0     0     0

I now finally have a new replacement drive installed in the system, but when I go to my pools in TrueNAS, it seems like the only options is for me to add it as a stripe vdev, instead of a mirror. Is this because I only have 1 drive currently? Is there a way for me to add this new drive as a mirror via the CLI or will I have to blow away the pool and start from scratch...

Drives are 12TB and da6 is the one I hope to add as a mirror.

 

[sretalla]

Drives are 12TB and da6 is the one I hope to add as a mirror.

Then you're in the wrong screen.

You need to go to that disk in the Status screen and select Extend. (which will attach that disk as a mirror to the one you select).

 

[Fish]

Then you're in the wrong screen.

You need to go to that disk in the Status screen and select Extend. (which will attach that disk as a mirror to the one you select).

Thank you! I knew I was making some silly mistake. Waiting for resilver to complete now

 

[eunix]

This is plausable. I have a similar problem with at 2 disk striped pool ( POOL-1) of 2x1TB disk. The Pool is Healthy but I am getting a bad read sector on disk ada9. I have replace an older 250G disk with a 2TB drive and I want to replace the ada9 disk with the new ad1 ( 2TB disk ).

If I extend ada9 with this disk (ada1 - 2TB) will I be able to reduce out or replace ada9 with this mirror disk ( similar to LVM )

My goal is to replace the other striped drive eventually with another 2TB disk and eventually double the size of the pool.

Thanks, in advanced.
eUNIX

 

[NugentS]

You can always (detatch I believe) a disk from a mirror and then extend it out again with another disk. Doesn't matter which disk.

Note that a better way (if you have a spare SATA port) is to add the new disk as aanother mirror - so you now have a 3 way mirror and then detach the unwanted disk. Pool should automatically expand once both disks are bigger

 

[eunix]

You can always (detatch I believe) a disk from a mirror and then extend it out again with another disk. Doesn't matter which disk.

Note that a better way (if you have a spare SATA port) is to add the new disk as aanother mirror - so you now have a 3 way mirror and then detach the unwanted disk. Pool should automatically expand once both disks are bigger

The failing disk is just making a lot of noise on the console as it read errors on a sector. The pool is fine. I have another new 2TB drive and 4 of the bays have hot-swap trays the display is a bit confusing as it look like the the two drives (ad9 +ada1) are mirroring ada10 but actually ada9+ada10 are the original striped vdev and ada1 was added to mirror ada9

 

[NugentS]

My reading of that is that you have a stripe and a mirror.
ada is in its own vdev and ada9 & ada1 are mirrored. - so I agree with you.
You need 1 extra disk (other than any replacements) to mirror ada10

 

[eunix]

My reading of that is that you have a stripe and a mirror.
ada is in its own vdev and ada9 & ada1 are mirrored. - so I agree with you.
You need 1 extra disk (other than any replacements) to mirror ada10

Thanks for the links.
I will be removing the questionable disk this weekend.