Failures on vSAN disk with valid SCSI sense data 0x4 0x44 0x0

Products

• VMware vSAN

Issue/Introduction

Operation health alert for a vSAN disk.

 

In logs, messages like the below are seen.

 

/var/run/log/vmkernel.log

YYYY-MM-DDT00:53:55.157Z In(182) vmkernel: cpu46:2097272)ScsiDeviceIO: 4686: Cmd(0x45ba9dffd5c0) 0x28, CmdSN 0x1ea8b2aa from world 0 to dev "____DISK_NAME____" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x4 0x44 0x0

 

Environment

vSAN OSA (all versions)

Cause

This SCSI status translates as follows.

 

0x28 is a read operation

D:0x2 translates to CHECK_CONDITION, and means a command has failed, and the valid sense data will have more information.

0x4 indicates a hardware error.

"0x44 0x0" means an internal target failure.

 

Resolution

All of the above indicates the disk has encountered a failure, and should be investigated by the hardware team.

 

If there is only one disk impacted, it is likely a problem with the disk itself.