Unable to open vmdk disk's when the 25th disk or later vmdk of a virtual machine using NBD transport mode

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:
Backup hangs in VixDiskLib_Open() call after 25 disks are opened or unable to open 25th or later vmdks of a VM using NBD transport mode.

Environment

VMware vSphere ESXi 6.5
Virtual Disk Development Kit 6.5

Resolution

This issue is resolved in ESXi 6.7, available at VMware Downloads.