Accessing the thin unallocated disk fails with the error: Failed to open new LUN LVID

Products

• VMware

Issue/Introduction

Symptoms:

• Accessing the thin unallocated disk fails.
• In the VDDK log, you see entries similar to:
  
  Acquiring disk lease for snapshot-3193[ds5k_svt_3] small-restore/small-restore_1.vmdk failed with vim.fault.CannotAccessFile.
  
  No path to device LVID:4c0fce68-53431c67-f9a7-00145ef44498/4c0fce68-f85d2262-8e53-00145ef44498/1 found
  
  Failed to open new LUN LVID:4c0fce68-53431c67-f9a7-00145ef44498/4c0fce68-f85d2262-8e53-00145ef44498/1
  
  "san://snapshot-XXXX[XXXXXXX] small-restore/small-restore_1.vmdk@immortal?vmtester/XXX" : failed to open (Unknown error)
  
  Failed to open 'san://snapshot-XXXX[XXXXX] small-restore/small-restore_1.vmdk@immortal?vmtester/XXX' with flags 0x1a Unknown error (318)
  
  TryMode: Use mode nbdssl to access [XXXXXXXXX] rrr/rrr.vmdk
  

Cause

This issue occurs when the vixDiskLib uses SAN mode to access thin unallocated disk which is not a lun. After failing to access the thin unallocated disk using the SAN mode, the vixDiskLib does not use other transport modes through which the disk can be accessed.

Resolution

This issue is resolved in Virtual Disk Development Kit 5.5 Update 3, available at VMware Downloads.

To work around this issue when you do not want upgrade to Virtual Disk Development Kit 5.5 Update 3, select other transport modes through which the disk can be accessed.