APAR status
Closed as program error.
Error description
When trying to backup a VM which has an existing snapshot and the CBT information could not be obtained the Incremental backups will fail and will show the following warning message : ANS9419W VMware Changed Block Tracking (CBT) cannot be enabled or reset for virtual machine 'VM_NAME' due to an existing snapshot. Full VM backup continues, and includes both used and unused areas of the disk. This message indicates that a full backup will be attempted because the CBT could not be reset because there is an existing snapshot however the full backup will also fail with the below error : ANS4174E Full VM backup of VMware Virtual Machine 'VM_NAME' failed with RC=7334 mode=Incremental Forever - Full, target node name='DC_NODE', data mover node name='DM_NODE' The manual VM backup with "-mode=iffull" will fail with the same error message and service trace will show the following : 01/15/2020 1357.171 [004652] [1764] : ..\..\common\vm\vmvisdk.cpp(9877): visdkVmHasSnapshots: We have one or more snapshot(s) on vmMoRef 'vm-326272' 01/15/2020 1357.171 [004652] [1764] : ..\..\common\vm\vmvisdk.cpp(9878): <========= Exiting visvisdkVmHasSnapshotsdkGetVmSnapshotMoRef() 01/15/2020 1357.171 [004652] [1764] : ..\..\common\vm\vmbackvddk.cpp(16450): vmVddkFullVMPrePareToOpenVMDKs: pre-existing snapshot found when enabling/resetting CBT 01/15/2020 1357.171 [004652] [1764] : ..\..\common\vm\vmbackvddk.cpp(16472): vmVddkFullVMPrePareToOpenVMDKs: Snapshot exists so cannot enable CBT; Failing backup. 01/15/2020 1357.171 [004652] [1764] : ..\..\common\vm\vmbackvddk.cpp(11181): vmVddkBackupVM(): after vmVddkFullVMPrePareToOpenVMDKs vmEntryP->vmAppProtection is 0 01/15/2020 1357.171 [004652] [1764] : ..\..\common\vm\vmbackvddk.cpp(14440): =========> Entering VmBackupVMCleanup() The ANS9419W message is misleading and should be updated because it states that a Full Backup will be attempted and then this Full backup attempt fails reporting the above errors. ======================= Affected versions: IBM Spectrum Protect for Virtual Environments - Data Protection for VMware 7.1.x and 8.1.x that has the fix for APAR IT26261 on all supported Windows and Linux platforms. ======================= Initial Impact: Medium ======================= Additional Keywords: TS003166074 tsm tdp ve vmware linux windows backup vm spectrum protect CBT reset existing snapshot
Local fix
1- Remove the existing snapshots and perform CBT reset as per the instructions in the below link and run another full VM backup for the affected VM: https://www.ibm.com/support/pages/backup-vmware-vms-can-be-corru pted-and-thus-not-restorable-if-snapshot-exists-when-cbt-enabled 2- If it is a must to keep existing snapshots for the VM then set the below option in the DM options file to force a full backup of the VM VMNOCBTCONTINUE YES
Problem summary
**************************************************************** * USERS AFFECTED: * * Data Protection for VMware versions 8.1.7, 8.1.8 and 8.1.19 * * running on all Microsoft Windows x64 and Linux x86 * * platforms. * **************************************************************** * PROBLEM DESCRIPTION: * * See ERROR DESCRIPTION * **************************************************************** * RECOMMENDATION: * * This issue is projected to be fixed in the Data Protection * * for VMware Data Mover version 8.1.10 on Windows x64 and * * Linux x86 platforms. * * Note 1: This is subject to change at the discretion of IBM. * ****************************************************************
Problem conclusion
The message has been updated.
Temporary fix
Comments
APAR Information
APAR number
IT32170
Reported component name
TSM FOR VE DP V
Reported component ID
5725TVEVM
Reported release
81W
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2020-03-23
Closed date
2020-04-23
Last modified date
2020-04-23
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Modules/Macros
dsmagent
Fix information
Fixed component name
TSM FOR VE DP V
Fixed component ID
5725TVEVM
Applicable component levels
[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SS8TDQ","label":"Tivoli Storage Manager for Virtual Environments"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"81W","Line of Business":{"code":"LOB26","label":"Storage"}}]
Document Information
Modified date:
11 July 2020