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Tuesday, 5 August 2014

Hot adding a virtual disk in ESXi 5.5 removes the multi-writer flag (2078540)

Symptoms

  • When a virtual disk is added while the virtual machine is powered on, the pre-populated multi-writer flag is removed from the.vmx file.
  • The hot add fails with file lock errors though the .vmx file contains scsix:x.sharing=Multi-Writer.
  • Hot addition of disks to Oracle RAC fails with file lock errors.

Resolution

This is a known issue affecting ESXi 5.5.
 
Currently, there is no resolution.

To work around this issue, power off the virtual machine and then add virtual disks.
 
Source:-