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Third-party backup software using VDDK 5.1 may encounter backup/restore failures (2039931)

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Third-party backup software using VDDK 5.1 may experience these symptoms:
  • Backup jobs may fail or hang
  • Restore Jobs may fail or hang


This article describes an issue with the VMware Virtual Disk Development Kit (VDDK) 5.1 that may cause backup and restore operations to hang or fail. Third-party backup vendors that are using the VMware VDDK may encounter backup or restore issues when backing up VMware vSphere environments.


The issue is fixed in Virtual Disk Development Kit (VDDK) 5.1.1. You can get the update at VMware Download Center.

For more information, see VDDK 5.1.1 Release Notes

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