VMWare Issue "Operation Failed Since Another Task Is In Progress"

You get this issue qhen a Vmachine is frozen. It's a snapshot issue. To fix this without rebooting the ESX server, you just have to kill the VM process via command line.

• Login with SSH into the host running the frozen vmachine
• The command
  cat /proc/vmware/vm/*/names
  shows you the list of the running VM's on the host. Write down the vmid of the frozen vm
• The command
  less -S /proc/vmware/vm/vmid_frozen_vm/cpu/status 
  shows you some stats about the vm. Scroll to the right with the right arrow key to get the vm id group (i.e. vm.1760). Write down the number after "vm."
  
• The command
  /usr/lib/vmware/bin/vmkload_app -k 9 vm_id_group
  unlock the vm and power off it. In a while you'll be able to run it again.
  
  

VMWare Converter issue: Error code 2147754767 (0x8004230F)

If you get the error "FAILED: Unable to create a VSS snapshot of the source volume(s). Error code: 2147754767 (0x8004230F)" while you're trying to convert a physical windows machine to a virtual one (hot cloning) you just have to check on your physical machine if the service "MS Software Shadow Copy Provider" is running. If not, start it and repeat the conversion procedure.

how to enable ssh on VMware ESXi 3.5

At the console of the ESXi host, press ALT-F1 to access the console window
Enter unsupported in the console and then press Enter
Enter the password for the root login
Edit the file inetd.conf
Uncomment the line that begins with #ssh and save the file
Run the command /sbin/services.sh restart

running 2 vm or more on a low-end server with VMware ESXi 3.5

Error: “Could not power on VM: Admission check failed for memory resource”
Go to Configuration system resource allocation > Click on advanced > Find the VIM object and change the reservation from 512 MB to 192 MB.
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Error: “Could not power on VM: Admission check failed for cpu resource”

On each virtual machines go to edit settings > Resources Tab. set CPU with a reservation of 0Mhz, and verify that Advanced CPU had Hyperthreaded Cored Shared Mode set to Any.