VMWare ESXi may report "SEsparse" snapshot may report guest data inconsistencies, refer to VMWare KB 59216.
This issue have also caused the Synology Active Backup for Business failed to perform scheduled backup thus generating error messages.
As per VMWare's KB 59216, the "datastore" capacity that has >2TB may encounter such issues from ESXi v.5.5 and above which means v.6.7 was also affected.
And the solution is update/patch the ESXi Host up to v.6.7 Update 1.
1. Browse to VMWare's Build Number & Listing to get the actual "Release Name" and its corresponding "Build Number" and download the patches accordingly.
2. Login to VMWare Patch Download page (you need to have an login ID, if not proceed to register an account).
3. Select --> ESXi (embedded and installable)
4. Select the appropriate ESXi version you are running, in my case my server is running on VMWare ESXi v.6.7
5. Now you need to compare the current build version vs. the listing and download the appropriate updates/patches.
6. Shutdown all VM(s) that are inside the Host.
7. Host --> Enter Maintenance Mode.
8. Host --> Enable SSH Service.
9. Host --> Enable Console Service.
10. Open --> Putty --> Login via SSH to the Host server.
11. At the CLI --> vmware -l (to display current version)
12. At the CLI --> vmware -v (to display current build)
13. At the CLI --> esxcli network firewall ruleset set -e true -r httpClient
14. Login to Host WebUI and browse the "datastore" (eg. datastore1).
15. Create a folder called "updates".
16. Upload all the downloaded patch files (eg. xxxx.zip) into the newly created folder (eg. "updates").
17. At the CLI --> esxcli software vib update -d /vmfs/volumes/datastore1/updates/xxxx.zip
18. Check the status of the updates (at top of the message), if status is "Successful" then proceed to "Reboot" the Host server.
19. Once rebooted, proceed to update the rest of the updates and each updates must be rebooted for it complete.
20. Upon reaching "Update 1", you may need to run a dependency check --> esxcli software profile update -d https://hostupdate.vmware.com/software/VUM/PRODUCTION/main/vmw-depot-index.xml -p ESXi-6.7.0-20181002001-standard
20.1 If you encountered any error, try this step to check the profile available --> esxcli software sources profile list -d /vmfs/volumes/datastore1/updates/update-from-esxi6.7-6.7_update01.zip
20.2 Then take note of the available profile (eg. ESXi-6.7.0-20181002001-standard).
20.3 Type this CLI --> esxcli software profile update -p ESXi-6.7.0-20181002001-standard -d /vmfs/volumes/datastore1/updates/update-from-esxi6.7-6.7_update01.zip
21. Once complete, reboot the Host server again.
22. Double check whether "Update 1" was successfully update.
23. At the CLI --> esxcli network firewall ruleset set -e false -r httpClient
24. Reboot the Host server again.
25. If everything is OK, proceed to "Exit Maintenance Mode" and power-on the VMs.
!!! HAPPY COMPUTING !!!
20-Dec-2022, Note: Added Steps #20.1, 20.2 & 20.3
