Adding additional drives to mirror existing pool?

[JWTech]

I have a 9.10.1 system configured with two equivalent drives striped.
I have two additional drives of the same size and model that I would like to add.

My thought was to have a Raid 10 setup by striping the two new drives then mirroring to the pre-existing stripe.

What would I need to do to produce this result without loss of data to the initial stripe?

 

[SweetAndLow]

if you have 2 striped drives you can't create a mirror out of that. You need to start with a mirror and then add more mirrors to get the stripe affect.

I think you need to backup your data and destroy your pool and do it right from the beginning.

 

[JWTech]

if you have 2 striped drives you can't create a mirror out of that. You need to start with a mirror and then add more mirrors to get the stripe affect.

I think you need to backup your data and destroy your pool and do it right from the beginning.

Alright, thanks for the info.

 

[Ericloewe]

You can add a drive to each vdev to turn them into mirrors. You'll need to do it manually, though.

 

[JWTech]

You can add a drive to each vdev to turn them into mirrors. You'll need to do it manually, though.

What steps would I take to accomplish that?

 

[SweetAndLow]

You can add a drive to each vdev to turn them into mirrors. You'll need to do it manually, though.

He has a stripe right now. You can't add redundancy to a stripe.

Sent from my Nexus 5X using Tapatalk

 

[Ericloewe]

He has a stripe right now. You can't add redundancy to a stripe.

Sent from my Nexus 5X using Tapatalk

Of course he can. Each drive is a vdev. Non-RAIDZ vdevs can have mirrors added or removed at any time. The GUI just doesn't expose that.

 

[JWTech]

Of course he can. Each drive is a vdev. Non-RAIDZ vdevs can have mirrors added or removed at any time. The GUI just doesn't expose that.

If you've got commands for me, I'd love to try this with my testing environment.

 

[Stux]

if you have 2 striped drives you can't create a mirror out of that. You need to start with a mirror and then add more mirrors to get the stripe affect.

I think you need to backup your data and destroy your pool and do it right from the beginning.

Not true.

You can turn a stripe (in ZFS terms a single drive vdev is a stripe) into a mirror by simply adding a drive to the vdev.


Use zpool attach "Converting a Nonredundant ZFS Storage Pool to a Mirrored ZFS Storage Pool"

You want to add the new drive via gptid. You should research that.

 

[JWTech]

Not true.

You can turn a stripe (in ZFS terms a single drive vdev is a stripe) into a mirror by simply adding a drive to the vdev.


Use zpool attach "Converting a Nonredundant ZFS Storage Pool to a Mirrored ZFS Storage Pool"

You want to add the new drive via gptid. You should research that.

Sounds great, and worked in my test environment when adding by geom name, but have you got any research material for me regarding adding via gptid?

 

[MrToddsFriends]

Sounds great, and worked in my test environment when adding by geom name, but have you got any research material for me regarding adding via gptid?

The info in this thread might help:
https://forums.freenas.org/index.php?threads/create-zfs-mirror-by-adding-a-drive.14880/

I applied this procedure with success not too long ago (not sure if it was in FreeNAS 9.3.1 or 9.10), but only for a single disk stripe.

 

[JWTech]

The info in this thread might help:
https://forums.freenas.org/index.php?threads/create-zfs-mirror-by-adding-a-drive.14880/

I applied this procedure with success not too long ago (not sure if it was in FreeNAS 9.3.1 or 9.10), but only for a single disk stripe.

Much appreciated. Worked perfectly in my testing environment.

 

[Stux]

Much appreciated. Worked perfectly in my testing environment.

Dusan's post is exactly what you want

 

[JWTech]

Forgot to mention earlier, but when doing this in the production environment, everything went perfectly.

No downtime as there was no need to reboot, and only minor performance loss during resilvering.

The company did not note any service disruptions throughout.