Disk Passthrough not working after upgrade

[n-buck]

Hi

After updating to 8.3, my SR did not work anymore.
I have created it like this:

mkdir /srv/NasDrives

ln -s /dev/sda2 /srv/NasDrives/sda

xe sr-create name-label="My Nas Storage" name-description="Nas Storage" type=udev content-type=disk device-config:location=/srv/NasDrives


xe sr-scan uuid=id

This results in disks with an unrecognized bus type and 0B size.
I am therefore not able to assign this sr to a vm.

Recreating the SR in a similar manor did not help as well.

[stormi]

Hi, and sorry for the late reply.

Has the situation evolved in the last two weeks?

Pinging @Wescoeur and @Nambrok for insight regarding the use of the udev driver.

[stormi]

And pinging @benjamreis regarding pass-through.

[Nambrok]

The udev sm driver is not PCI passthrough, it makes tapdisk directly show the block device through a PV device to the VM. I will take a look to see if there is any changes in 8.3.

[n-buck]

@stormi thank you for the reply.
The situation has not changed (downgraded to 8.2 again).

How would I test this again, is there a patch released, or would I install again from the iso, then update with yum?

[stormi]

No, no patch released that would address this kind of issue. If you can reproduce on a test host, or find a way for us to reproduce, we can try to find the cause.

[n-buck]

Hello Stormi,
Sorry for the late reply.

Since this is my only set-up and I did not have the storage to backup my data, I was somewhat afraid to test it further on this system.

What I did:

1. Run XCP-NG 8.2.1
2. Create a new Storage-Repository:
   2.1 mkdir /srv/NasDrives
   2.2 xe sr-create name-label="My Nas Storage" name-description="Nas Storage" type=udev content-type=disk device-config:location=/srv/NasDrives
   2.3 ln -s /dev/sda2 /srv/NasDrives/sda ...
   2.4 xe sr-scan uuid=664fb621-a084-8c9a-9858-1041fe5f5a67
3. Assign it to a VM
4. Update to XCP-NG 8.3
   4.1 The Storage-Repository has no drives.
   4.2 Recreating a Storage Repository as described in step 2 did not work either
5. Restore XCP-NG 8.2.1

Since this is also not a supported way to pass the drives to TrueNas, I am in the process to upgrade my system to passing the disks with a HBA.

I hope this is of any help, and thank you for an amazing product!