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I'm trying to backup virtual machine on ESXi 5.0 using Trilead Vm Explorer 3.7 but I'm getting 500 internal server error:

1) Snapshot is created.

2) Files download started. Some files have been downloaded, but when -flat.vmdk file download starts, after 3-4 minutes download interrupted with "500 internal server error".

I tried to download manually using SSH(WinSCP) but same thing, -flat.vmdk file download starts and after 3-4 minutes download interrupted with SCP error.

I have three virtual machines on one datastore. lockdown mode is disabled.

Can anybody help?

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This question needs more details to help people to answer it.Does Trilead Vm Explorer produce any logs?What are you trying to copy with WinSCP?Looks like you are downloading file extents and it is in use. –  Sergei Dec 25 '11 at 11:51
I'm trying to download -flat.vmdk file which shouldn't be in use after snapshot is created. Trilead Vm Explorer has no log file. –  levanoz Dec 25 '11 at 14:34
I suspect you may have wrong idea how snapshotting in ESX works.You cannot just copy files after snapshot is created. –  Sergei Dec 25 '11 at 20:35
Can you give me some advice regarding VMs backup without turning them off? –  levanoz Dec 26 '11 at 17:00
There are already some topics on Serverfault that cover it, i.e. serverfault.com/questions/311459/… , serverfault.com/questions/162843/… –  Sergei Dec 27 '11 at 13:34
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