cloning pve from single disk to raid zfs

[edoardofranciosi]

I’d like to take a backup copy of all my pve os… and i’m asking if is possible to take a full copy of dev/sda (pve os) to a raid 1 ZFS… i thought about using dd but i’m not sure about it

hoping someone would discuss about it with me

 

[Dunuin]

Was the single SSD installed with ZFS for the root filesystem? Then you could mirror it. Otherwise the only option I see would be to back all guests up and reinstall PVE using a ZFS mirror.

 

[edoardofranciosi]

the single ssd is in xfe, but I would like to keep a copy of the entire operating system in case of disaster recovery and I had thought about making "backups" with "dd" by copying the SSD onto a ZFS raid
ssd os sdX
hdd raidZFS sdY/sdZ
i'm thinking about:

"dd if=dev/sdX of=dev/sdY bs=64k conv=noerror ,sync"

and the resilver copy all data from sdY to sdZ

 

[Dunuin]

The question is how consistent your backup will be when doing this while PVE is running (so root filesystem is n use and written to). Most secure it would be be to do this while booting into some other OS on another disk. For example by booting into a clonezilla on a USB pen drive (but no idea if that supports local ZFS as target storage) or by booting into some live linux with ZFS support like Ubuntu and then use dd.

 

[edoardofranciosi]

actually I hadn't thought about the most important thing: file systems... clonezilla doesn't support zfs in that case but I could create a manual duplicate copy... in your opinion the best would be to use filezilla? I've always used that one but if you tell me that ubuntu with "dd" is more secure I can try using that one

I thank you very much, you are always the first to respond