The RDM LUN resets while powering on the virtual machine

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:

• When starting a virtual machine with an attached RDM, the LUNs reset
• You see log entries similar to:
  
  VSCSI: 2252: handle 8335(vscsi1:0):Reset request on FSS handle 262343 (0 outstanding commands)
  VSCSI: 2326: handle 8335(vscsi1:0):Completing reset (0 outstanding commands)
  WARNING: NMP: nmpDeviceTaskMgmt: Attempt to issue lun reset on device eui.0017380002aa36c7. This will clear any SCSI-2 reservations on the device.
  NMP: nmp_CompleteCommandForPath: Command 0x0 (0x4102bfa50640) to NMP device "eui.0017380002aa36c8" failed on physical path "vmhba2:C0:T3:L51" H:0x0 D:0x2 P:0x0 Valid sense data: 0x6 0x29 0x0.
  ScsiDeviceIO: 1688: Command 0x0 to device "eui.0017380002aa36c8" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x6 0x29 0x0.
  WARNING: ScsiCore: 1355: Power-on Reset occurred on eui.0017380002aa36c8

Environment

VMware vSphere ESXi 6.5
VMware vSphere ESXi 8.0
VMware vSphere ESXi 7.0
VMware vSphere ESXi 6.7

Cause

Resolution

Resets are usually sent to the RDM LUNs while starting the virtual machine.

This is an expected behavior and the messages can be safely ignored.

However, if the H:0x0 D:0x2 P:0x0 Valid sense data: 0x6 0x29 0x0 messages are seen at any other time, there may be a problem with the storage or the array may have trespassed the LUN.

Additional Information

Frequent PowerOn Reset Unit Attentions occur on path