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12.3 -> 13 upgrade ---- Hot add failures after upgrading

  • January 29, 2026
  • 6 comments
  • 27 views
R
  • RPS1
  • Not a newbie anymore

Hi All, 

 

Has anyone seen hotadd Linux (Rocky 9.7) VM proxies go sideways and not mount after upgrading to v13? I also added a new v13 appliance proxy and the result were the same. Changing transports to net work fine. On this client side logging it shows:

 

Error: Access to [/dev/sdb] is denied.
Failed to check whether access to path is granted
Failed to open disk for write.
Failed to download disk 'snapshot-909174XXXX'.

 

CC tenant job logging has:

 

<842>    Info (3)    Skipping VcdDatastore (VcdRef=[urn:vcloud:datastore:GUIDXXXXXX], Name=[*CLIENT_DS*]) because it does not have valid underlying vCenter resources

 

VCSA 8.3

VCD 10.4x

VBR 13

Rocky 9.7 latest Kernel. 

 

We have a Sev1 open but its currently pending logging reviews. 

 

      6 comments

      Tommy O'Shea
      Forum|alt.badge.img+5
      • Tommy O'Shea
      • Veeam Legend
      • January 29, 2026

      I’ve seen similar things, haven’t had the time to investigate the root case, and I’ve switched the proxies to ndb mode for now.

      Cloud Connect replication has always been a bit finicky with hotadd

      Tommy O’Shea, VMCE, VMCE-SP, VMCA
        Chris.Childerhose
        Forum|alt.badge.img+21

        I would continue on with your P1 with support to get to the bottom of this.  Changing the mode is a workaround to me and they should be able to address the root of the issue.

        Chris Childerhose (Enterprise Architect) - VMCA2024 | VMCE2023 | VMCE-SP2024 | Veeam Vanguard 8* | Veeam Legend 5* | VUG Canada Leader | vExpert 6* | Toronto VMUG Leader | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech
          D
          Forum|alt.badge.img+3
          • ddomask
          • Comes here often
          • January 30, 2026

          Hi ​@RPS1 , 

           

          Yes, are you a Service Provider?

          >Error: Access to [/dev/sdb] is denied.

          Can you please ask your engineer to review case 07917164 and see if it applies. There was an issue with VCC environments where linux-based proxies would fail to read with hotadd. I am not sure on the status of a private fix, but the main issue seems similar. 

          As an immediate workaround, switch to NBD for the transport mode or spin up a Windows based proxy temporarily. 

          Edit: for future readers, this only potentially applies to Veeam Cloud Connect and v13.0.x; if your version is newer or not related to anything Cloud connect, a Support case will be required.

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            R
            • RPS1
            • Author
            • Not a newbie anymore
            • January 30, 2026

            Yes, we are. Thanks I’ll pass this along. 

              D
              Forum|alt.badge.img+3
              • ddomask
              • Comes here often
              • January 30, 2026

              Glad to assist, ​@RPS1 

              There is an internal support document ID I can share also, your Support Engineer will likely have better luck with this:

              KB0047494

              (Internal KB, not publicly accessible)

              0x0D 0x0A
                R
                • RPS1
                • Author
                • Not a newbie anymore
                • January 30, 2026

                Even better. 

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