Map disk region events are generated during the virtual machine back up
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Map disk region events are generated during the virtual machine back up

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Article ID: 324649

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Updated On:

Products

VMware vSphere ESXi

Issue/Introduction

  • When taking a backup of the large vmdk file, vCenter Server goes into unresponsive state.
  • Map Disk Region events are generated continuously.

Cause

When you take a backup of the vmdk file using the SAN transport mode, Map Disk Region call is initiated by VDDK to obtain the mapping of the disk. If disk is large or highly fragmented, multiple calls are initiated to obtain the mapping across the disk. Every time a call is initiated, vCenter Server events get updated with the call info as Map Disk Region. vCenter Server database is filled with Map Disk Region events and vCenter Server becomes unresponsive.

Resolution


This issue is resolved in VMware vCenter Server 6.0 Update 3 and VMware vCenter Server 6.5 Update 1d.