Hot add is not supported for this disk since update

[AndyR]

Hi,

Have been using Veeam for about 10 months now without any problems, works great! I was running it on a 2003 R2 VM and using the Virtual Appliance backup method to backup all my VMs and they always completed OK without errors.

A couple of weeks ago though, for some reason my VM just wouldn't mount the iSCSI drives anymore, kept giving driver errors and no matter what I did I couldn't get it to mount. So I ended up getting rid of the VM and rebuilding a new one, this time with 2008 R2 and the latest version of Veeam (5.0.2.230 64bit) where before I was on the previous version. This connected fine and I set all my jobs up the same and all good, the backups complete.

Now however, despite every job completing OK and in the same time frame/speed, each jobs shows up

Hot add is not supported for this disk, failing over to network mode...

Like I say, the speed/time hasn't changed so I'm not sure why this is coming up. Could it be it was always failing over before but just not logging it? If so is there a way I can try and stop it failing over to see if I can eeak out a bit more performance from the backups?

Thanks!

Andy

[Gostev]

Hi Andy, I believe that logging of this event was not in the product originally. So in earlier versions, the engine simply would not notify you about failover happening, but just failover silently.

The list of reasons why hot add may fail are listed in the sticky FAQ topic, if you can identify and remove the reason, then hot add should start working for this VM.

Thanks!

[AndyR]

Awesome, thanks for the quick reply Gostev. Suspected it might have been a silent failover but thanks for confirming. I'll have a dig through the sticky and see if I can trace the cause.

Thanks!

[chri5]

[merged]

Can anyone tell me what this warning means on my backup jobs? "Hot add is not supported for this disk, failing over to network mode..." I am running v6 with patch 2

Thanks
Chris

[Mika44]

I have the same problem.
Installed version : v6 + HF2 = build 164
HotAdd always failed !!
Does anyone have a solution ?

[foggy]

Please read carefully through the Anton's post above.

[joench]

Anton? Do you mean Andy? I still see no answer ...

[foggy]

The list of reasons why hot add may fail are listed in the sticky FAQ topic, if you can identify and remove the reason, then hot add should start working for this VM.

And here is the direct link to that FAQ section.

[AndyR]

I haven't fixed my issue yet either, but being honest I haven't had time to look at it that much. The backups are working even with the hot add error, and are going the same speed as on the previous version when i didn't get the error, so I'm happy to leave it at that for the time being until I get more time being a 1 man IT sys admin for 60 users and 80 servers.

I think though my problem might be -

• LUN with Veeam Backup server is located should have capacity more than (or equal) the capacity of the disk which is being hot added. Actual free space can be less than hot added virtual disk size.

As I have my Veeam VM on a management LUN which is only 100Gb but only around 10Gb free of provisioned space, 40gb free actual, so I guess this might be the cause. Will confirm if I ever get chance.