PowerProtect Data Manager 19.11 Virtual Machine User Guide

Unsupported virtual machine platforms and configurations

TSDM virtual machine protection is not supported for the following virtual machines, configurations, and platforms:

• Physical RDMs
• Virtual RDMs
• Encrypted virtual machines
• Fault Tolerant virtual machines
• Azure VMware Solution (AVS) on Microsoft Azure
• Google Cloud VMware Engine (GCVE) on Google Cloud Platform (GCP)
• VMware Cloud (VMC) on Amazon Web Services (AWS)
• Virtual machines with Site Recovery Manager enabled.

Site Recovery Manager unsupported for TSDM-protected virtual machines

PowerProtect Data Manager does not support the enabling of VMware's Site Recovery Manager (SRM) for virtual machines that are protected with TSDM. Ensure that you disable SRM protection for any virtual machines that use the TSDM protection mechanism, or manually configure these virtual machines to use the VADP data mover instead to continue using SRM.

Asset copy size reported differently for TSDM backups with thin-provisioned disks in release 19.10 and later

An increase in the asset copy size of TSDM backups with thin-provisioned disks might be observed due to the manner in which asset copy size is reported in PowerProtect Data Manager 19.10 and later. For thin-provisioned disks, the asset copy size now reflects the capacity (provisioned size) of the disks instead of the used size. No actual increase in size has occurred.

Timeout occurs for virtual machine backup exceeding 20 TB

When a TSDM-enabled virtual machine backup exceeds 20 TB of data, a timeout occurs waiting for the TSDM full sync operation to complete.

To work around this issue, use VADP for the backup, or perform the following steps to increase the TSDM memory limit:

1. On the ESXi host, copy the tsdm init script to a new file:

   cp /etc/init.d/tsdm/etc/init.d/tsdm1

2. Modify the file definitions section of the new file to change the value for TSDM memory. For example, change MEMORY="768" to MEMORY="1536".
3. Retry the operation using the new init script:

   /etc/init.d/tsdm stop

   /etc/init.d/tsdm1 start

VADP restore of TSDM backup restores disks as thick-provisioned in some circumstances

If VADP data path is used to restore a virtual machine that was backed up using the TSDM protection mechanism, the disks are restored as thick-provisioned instead of thin-provisioned. PowerProtect Data Manager uses VADP data path for restores in the following circumstances:

• The virtual machine is restored in a vSphere environment running with a version previous to 7.0 U3.
• The virtual machine is restored to an ESXi host that does not have the TSDM vSphere Installation Bundle (VIB) installed.
• The virtual machine is restored directly to the ESXi host, since the vCenter server is not used for a Direct Restore to ESXi.

Virtual Machine Disk (VMDK) limit for virtual machines protected with TSDM

TSDM-based protection supports a maximum of 40 VMDKs per virtual machine. If this limit is exceeded, backups are queued for a longer time, and must be canceled manually.

For virtual machines with more than 40 VMDKs, you can override the protection mechanism at the asset level to use VADP. The section Migrating assets to use the Transparent Snapshot Data Mover provides more information.

Size of thin provisioned files created by vSphere during TSDM operations does not reflect the true size written to file system

VMware vSphere creates files that are displayed as two times larger than the VMDK files of the virtual machines that are protected by TSDM. The names of these files end in -flat.ses, and the files are located in the same VMFS volume and directory as the VMDK files of the protected virtual machines.

These are thin-provisioned files and part of normal TSDM operations. To determine the real amount of data that is written to the file system, use the du command.

vMotion of TSDM protected virtual machines

vSphere disables the vMotion migration of virtual machines to an ESXi host version previous to 7.0 U3 when the virtual machine is protected with TSDM. In order to migrate the TSDM protected virtual machine to an ESXi version that does not support TSDM, you must disable the Lightweight Delta (LWD) filter that is attached to the virtual machine during the initial protection policy configuration. To disable the filter, remove the virtual machine from the TSDM protected virtual machine protection policy. Once the virtual machine is removed from the policy, a job is automatically initiated to disable the filter.

Once the vMotion completes, you can re-add the virtual machine to the protection policy. This virtual machine is then protected by the VADP protection mechanism, since the new ESXi/cluster host version is lower than the version required by TSDM.

Removal of managed snapshots required before running virtual machine protection policies

A PowerProtect Data Manager virtual machine protection policy cannot be configured to use the TSDM protection mechanism when the virtual machine contains managed snapshots. Verify that no managed snapshots exist for the virtual machine, and then retry the configuration job from the System Jobs window of the PowerProtect Data Manager UI.

TSDM only available for virtual machine crash-consistent policies

Use of the TSDM protection mechanism is only supported for crash-consistent virtual machine protection policies. Also, the virtual machine crash-consistent policy must have the swap file exclusion and quiescing options disabled.