Let me first explain what exactly I have done.
I was having a server(A) but it was having / dir with 20GB limit.
It was creating issues when I was updating software or if I was adding something new software.
What I did to solve is that I created a "Spare"(B) server and migrated all my accounts to that spare server. (Created backup and restored them)
Then the I changed my DNS IP to "Server B" to make all sites live from the spare server.
AFter that I reinstalled OS in "Server A" and the migrated all the backups which was taken from *"Server A"*.
I did not create a backup from Spare Server(b) to save time and preferred to use the backup of "Server A" which was created before the server was deleted.(Same backup was restored in Spare Server (server b).
Now coming to the problem.
My client is saying there is some issue with "Database" and the database is not restored properly. However, I did not receive any error of warning from any accounts.
He claims "routine" data from database is missing which is malfunctioning his websites.
I created backup using DA control panel option to create backup from "admin" account.
Please help me to check what went wrong and why data got missing
Edit : I have even lost "100%" data from random databases.
(No error was shown in message when backup was created and notified from DA messages)