How can I remove a cache drive from a pool without any loss?

[kzsolt4444]

Hi all!

I have 2x6TB HDD on one of my pool, with 1x 256GB nvme cache drive. I wan't to remove that cache drive from the pool.

I have two question with it.
1. Can i remove it, without any damage on the pool itself? (I mean the data on it.)
2. How can i do this? I mean how exactly can i remove the cache VDEV from this pool? On the GUI i can see only 'replace' button, but would like to completely remove it from the pool. I want to take it out (that nvme drive unit) from my motherboard (i want to use a new unit for a completely new pool)

Thank you!
Zsolt

 

[sretalla]

1. Can i remove it, without any damage on the pool itself? (I mean the data on it.)

Yes.

How can i do this? I mean how exactly can i remove the cache VDEV from this pool? On the GUI i can see only 'replace' button, but would like to completely remove it from the pool. I want to take it out (that nvme drive unit) from my motherboard (i want to use a new unit for a completely new pool)

At the CLI,

zpool remove PrivateDataPool1 <name of device> get the name of the device from zpool status PrivateDataPool1

 

[kzsolt4444]

It worked without any problem!
I saw the same commands on other posts, but they were like 5 years old comments, and i tought they are outdated. But no, it is still a valid command.

Thank you very much!

 

[sretalla]

That command dates back to the original Solaris (now Oracle) ZFS days.

It's no mistake that those original commands are almost all retained and unchanged in syntax/function. It's a very solid system.

 

[Blakestandal]

(ignore the degradtion.)

I have the same issue, I want to remove the cache drive.

"zpool remove WD Reds 50d70a11-7e4f-4857-bd1d-0da91985a7d1" doesn't work. Am i missing something? I sispect it's with my old name of the pool with the space in it "WD Reds".

 

[Patrick M. Hausen]

Try 'WD Reds' with the quotation marks. Having a space in the pool name is probably not a good idea.

 

[Blakestandal]

Try 'WD Reds' with the quotation marks. Having a space in the pool name is probably not a good idea.

worked like a charm! and dont i know it... leaning mistake for sure. V2 will not be that way. thanks again.