Replacing drives in Zpool

[fsociety3765]

Hi all,

I currently have 4x 1TB NVMe drives running as a stripped mirror for my VM disk storage. I am in the process of replacing them all for 2TB drives.

I'm happy with using the zpool replace command. I have replaced two so far, the second one is just re-silvering now. I currently only have 3x 2TB drives though for the replacement. I'm yet to get the 4th drive.

Once I have replaced the third drive, what will happen if I remove the fourth? Will the zpool automatically grow and run in a degraded state, thus inhibiting me from re-installing the 1TB drive, or is the growth of the pool a manual operation from the command line?

Thanks,

FS

 

[fsociety3765]

So I have replaced three of the drives now. No problems.

Although there is a message about running zpool upgrade to enable new features. Is this generally a safe operation to carry or are there any considerations I should make before doing so?

Thanks,

FS