Help needed with migrating Proxmox install from 2 x 500GB HDD (mirror) to 2 x 250GB SSD (mirror)

[FlyingSky]

I have a fairly basic home server set up running Proxmox (version 5.3-6) and in a couple of days I plan on replacing the 2 x 500GB hard drives, acting as it's boot device, with 2 x 250GB SSDs. This plan has sparked some questions that I was wondering if anyone here could help with:

1. What is the best way to transfer all of my containers and settings to the new drives? Mass storage is held separately in a 3 x 2TB RAIDZ1 array with specific folders mounted into the containers so I'd imagine that will not be a problem. Is that correct?
   
   
2. Will I need to un-mount and re-mount my mass storage zpool and if so, how should I go about doing that?
   
   
3. So far I've been unable to boot direct into the ZFS mirror so I've been first booting into a Proxmox install USB and then booting to recovery mode. Is there a way around this hack?
   

 

[Haider Jarral]

I have a similar situation as well, this is what I have learned so far,

First off try to to shrink your 2X500 GB to lowest size ideally lesser than 250GB
Next use clonezilla to clone hdd to ssd with option enabled to ignore size check.

That should do it if not check boot flag and uuid.