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Replace the of= part with your drive The command is: <Command> dd <input> if=zero <output> of=/dev/<your disk> This will write "0" on whole disk. Effectively emptying out everything.

Yeah, that is what it looks like. If you feel comfortable, do a double or even tripple check on drive I'd, I. E. Sda, sdb etc and run the DD on each and see if it solves the problem. Pick 2 , run DD on then, than try creating a mirror zfs. If works break it and do same for the rest. Slow and...

Don't know your situations but I usually take the disks out and use my other pc to manipulate them. This way I can always know what I am working with. And yes you need to be very careful with dd command. Also it seams that your disks are mounted somewhere. Check your system settings. I think...

Do this drives show up differently in lsblk command after the cleanup? The re-creating gpt table always worked for me. The only other thing I did ones is zerro out the disk with dd. dd if=/dev/zero of=/dev/hdX This removes everything but is wery long process.

I did not mean delete partition. I ment go into gdisk(cli) look at disk structure. It should list 3 option after message that partiotn table of type found. Choose to create clean gpt. This should remove anything on the disk and create an new clean gpt table. You may need to remove and...

Why not simply delete the partition table on each and recreate it?

You do not need to do anything. Just mount the sdb1 and it is ready for data storage.

Well before anything else check your cables. A loose power or sas/sata cable to the disks will do that. If not , and you are sure the disks are ok, it may be your PSU.

It says right there. There is a problem with your drive. You need to replace the physical SSD drive and then replace it in the pool. You are trying to add original SSD back when it fails.. Edit: sorry, mistook your new I'd for existing one. Disreguard this post please.

Not 100% sure if it is the same for grub and uefi setup but on my config I did gdisk replicate and then DD on first and 3rd partition (old setup) On your it would be first and second. But I also had to do grub install and I don't know what needs to be done for uefi.

can you get into Proxmox WebUI? if yes maybe you can get to VM via built in console, than you can reboot it and see what is going on. you can also check logs

Good to hear it. The install should do that for you but some times and specially with zfs it does not do a good job.

You need to provide more detailed info. But free users do not get fast support. This is a community help system. You need to wait until someone with specialised knowledge log in and read your post. But what you can try is , if you still want to reinstall again, take the disks out and clear them...

To OP, are you sure that vm are down? Or you assume they are because you can not reach them via ip? Can you reach the host UI? If yes first thing first, as James said, back up everything you can. Get an external disk big enought to hold the vm images and data and do full backup. Than back up...

Ok, I am marking this as solved. Turned out it was my bios that is totally screwed up. It not allows more than 2 boot disks, really? A server MB only allows 2 boot devices, but I had to fiddle with settings for like 3 hours untill I found where and what need to be set for it to work.

Hate to resurect an old thread, but is there a help on how to do the very same thing on system prior to 5.4? I am running 5.3 and not updating because last update from 5.1 to 5.3 housed the install and I had to redo everything from scratch as I simply could not recover the VMs. I folowed...

nope, run grub-install on both disks . boots from original not from new. this is result of pveversion -V if it helps root@pve2:/# pveversion -v proxmox-ve: 5.3-1 (running kernel: 4.15.18-12-pve) pve-manager: 5.3-11 (running version: 5.3-11/d4907f84) pve-kernel-4.15: 5.3-3...

As far as I know it shouldn't matter.but I will re run the grub and retry boot Let you know

root@pve2:~# zpool status rpool pool: rpool state: ONLINE status: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected. action: Determine if the device needs to be replaced, and clear the errors...

Ok have to resurect this thread as I just found out my new disk is not bootable. I run grub install and nothing. Reading the guide again and the docs and not sure how to proceed next. A few more questions for gurus. 1. What is the safest way to upgrade system from 5.3 to 6 , I guess? 2. Best...