Olivier thanks for the links. But it only confirms my idea that I should go for the latest releases as far as possible!
Yep I agree that security fixes are the most important ones. And I know that security patches are provided (as I wrote in my mail).
Since I am new to XCP-ng, and I did not study the changes related to 8.3, I do not know the improvements, but I assume there are!
The latest versions tend to have fixes, security updates and probably added features. For those reasons I always prefer to use the latest versions the more at the moment I start a new system.
So, I am not saying 8.2 is bad / not ok, but on the other hand I am surprised to see that 8.2.1 is over a year old. And at the same time I note that there is a xen-server release november 2022.
I assume that XCP-ng is based on xen-server. But on which version !??
Of course there have been security updates, but never the less. But I have no idea what has changed since the original 8.2.1 release. As far as I am aware there is no change log.
I consider setting up an XCP-ng server .... or perhaps a xen-server
(for private use), since I like the concept!
The problem is that the actual 8.2.1 release is over a year old ...
Looking at XEN that release 4.17 is much more recent ...
So I consider 8.3 .... however ... it is alpha which sounds as ^still a long way to go^ / not stable. I also think I would need to update from 8.2 since there is no 8.3 snapshot.iso available
So I wonder what the expected 8.3 timeline is, and to which extend XEN 4.17 is included in the 8.2 / 8.3 release.
This is not a new available patch like the ones which become available on any OS every day!
It is a tested set of patches which become available as a "package". So I stay which my opinion that it is lets say a "dot-release". With a new number, a new download and a version history.
And yep of course you can update via the regular update method .
IMHO every set of patches should lead to a new version number and a changed initial download,
so if this is only a small update than it could be 8.2.1.1
My opinion of course but I would like to see a far more traceable update process
I am completely lost in relation to the way new software or updates are released.
So, I am lost .....
I did post here, because I am almost sure that I am facing serious bugs in the actual version. Of course I can be wrong, however I do think that the described problems are not related to things I am doing wrong. So it is more that I intended to make the team aware of the problems, then that I think I need help .....
Because I assume bugs, I did upgrade intermediately after the install, .... however, that did not solve the noted issues ...
I also installed Ubuntu in an VM on my windows10 system and compiled XOA. And tryed to generate storage from there, which not so strange, did lead to the same error messages seen before (I tried to define storage types EXT and ZFS).
Related to ZFS, I wrote that since I did read some were that it was not yet formally supported.
Note that my server does have disks installed (not intended for XCP-ng). The disks are ZFS storage pools active when I boot the server as TrueNAS server. That should not be a problem .... IMHO.
Note that I can not detach them, since it also involves NVME-drivers on the motherboard.
Also note that the SSD use for XCP-ng has been used for other purposes before probably including ZFS-partitions. I write that here because I noted people reporting issues related to disks previously used for ZFS.
I did a fresh install using "xcp-ng-8.2.1.iso". However after doing that it seems that I have no local storage. I do have a couple of error messages 
More info:
lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme0n1 259:0 0 931.5G 0 disk
└─nvme0n1p1 259:1 0 931.5G 0 part
sdb 8:16 0 14.6T 0 disk
├─sdb2 8:18 0 14.6T 0 part
└─sdb1 8:17 0 2G 0 part
sdc 8:32 0 12.8T 0 disk
├─sdc2 8:34 0 12.7T 0 part
└─sdc1 8:33 0 2G 0 part
nvme1n1 259:2 0 1.9T 0 disk
├─nvme1n1p2 259:4 0 1.9T 0 part
└─nvme1n1p1 259:3 0 2G 0 part
sda 8:0 0 465.8G 0 disk
├─sda4 8:4 0 512M 0 part /boot/efi
├─sda2 8:2 0 18G 0 part
├─sda5 8:5 0 4G 0 part /var/log
├─sda3 8:3 0 424.3G 0 part
├─sda1 8:1 0 18G 0 part /
└─sda6 8:6 0 1G 0 part [SWAP]
[12:16 Tiger ~]# xe sr-create name-label="LocalStore" type=ext device-config-device=/dev/sda3 share=false content-type=user
Error code: SR_BACKEND_FAILURE_77
Error parameters: , Logical Volume group creation failed,
So, three questions:
Hello,
I am new to XCP-ng and XEN. So perhaps my remark is not correct.
However when I checked the XEN-version in dom0 (console xl info) I was quit surprised to see that was 4.13 (18 dec 2019) where the actual version is 4.16 !!! ????
I assume that that version was installed with XCO-ng. I additionally installed a "build from source" Xen Orchestra version as well.
Should I upgrade XEN!? (I assume so) or do I break something!?