vSAN Disk or group may report failure on vSAN

Products

• VMware vSAN

Issue/Introduction

• vSAN skyline health may show warnings for physical disks for one or more drives.
• vSAN object health may show health warnings for data health.

 

Environment

• VMware vSAN 7.x
• VMware vSAN 8.x
• VMware vSAN 9.x

Cause

• The issue is seen when one or more vSAN disks experiencing WRITE (0x2a) errors. 
• This can be verified by looking into the logs /var/run/log/vmkernel.log on ESXi host and would show the events as below with sense data H:0x0 D:0x2 P:0x0 Valid sense data: 0x4 0x0 0x0.
• Example snippet as below.

/var/run/log/vmkernel.log:
2021-01-05T08:37:16.337Z cpu26:2098033)ScsiDeviceIO: 3047: Cmd(0x45a3e27a1700) 0x2a, CmdSN 0x2238d from world 2960707 to dev "naa.#####" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x4 0x0 0x0.

Resolution

This needs investigation from the hardware vendor to check on the disk health and further actions.