Unable to add the disk to disk group post replacing the defective capacity disk.

Products

• VMware vSAN

Issue/Introduction

Symptoms:

Unable to add the disk to disk group post replacing the defective capacity disk.

Validation: 

• Disk group creation failed with the following error:

A general system error occurred: AIO zero write failure to device /vmfs/devices/disks/naa.################ exception AIO write failure for device naa.################

• Device statistics indicate that there have been numerous failed read/write operations.

• Command: esxcli storage core device stats get

naa..################ :
   Device: naa..################
   Successful Commands: 14329051969
   Blocks Read: 97463258079
   Blocks Written: 64638172860
   Read Operations: 7671279104
   Write Operations: 6657139224
   Reserve Operations: 20
   Reservation Conflicts: 0
   Failed Commands: 304997
   Failed Blocks Read: 620931
   Failed Blocks Written: 37770
   Failed Read Operations: 134858
   Failed Write Operations: 144994
   Failed Reserve Operations: 0

• A disk was detected as 0 GB under the Dell Server console, indicating that the issue is with the disk.

Environment

VMware vSAN 7.x

VMware vSAN 8.x

 

Cause

• The replacement disk that was added to the system was also identified as faulty, as it failed to initialize correctly and exhibited the same issues as the originally defective disk.

Resolution

• Engage the server hardware vendor to replace the defective drive and ensure the replacement disk is verified to be healthy and compatible, allowing successful detection and mounting for system consumption.